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2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

Attention Clinicians:

It is important to note that the recommendations developed in this Guide are intended to serve
as a reference point for clinical decision-making with individual patients. They are not intended
to be rigid standards, limits or rules. They can be tailored to individual cases to incorporate
personal facts that are beyond the scope of this Guide. Because these are recommendations
and not rigid standards, they should not be interpreted as quality standards. Nor should they be
used to limit coverage for treatments.
This Guide was developed by an expert committee of the National Osteoporosis Foundation
(NOF) in collaboration with a multi-specialty council of medical experts in the field of bone
health convened by NOF. Readers are urged to consult current prescribing information on any
drug, device or procedure discussed in this publication.
National Osteoporosis Foundation
1150 17th St., NW, Suite 850, Washington, DC 20036
REVISED 2013. National Osteoporosis Foundation (NOF). All rights reserved.
No part of this Guide may be reproduced in any form without advance written permission from
the National Osteoporosis Foundation.
BoneSource® is a registered trademark of the National Osteoporosis Foundation.
Suggested citation: National Osteoporosis Foundation. Clinician's Guide to Prevention and
Treatment of Osteoporosis. Washington, DC: National Osteoporosis Foundation; 2013.
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

2013 Clinician's Guide Update Committee and Organizations Represented

Felicia Cosman, MD, Chair, National Osteoporosis Foundation
Robert Lindsay, MD, PhD, Co-chair, National Osteoporosis Foundation Meryl S. LeBoff, MD, National Osteoporosis Foundation Suzanne Jan de Beur, MD, American Society for Bone and Mineral Research Bobo Tanner, MD, International Society for Clinical Densitometry NOF acknowledges the following individuals for their prior contribution to this project: Members of the 2008 Clinician's Guide Development Committee: Bess Dawson-Hughes, MD, Chair, National Osteoporosis Foundation Robert Lindsay, MD, PhD, Co-chair, National Osteoporosis Foundation Sundeep Khosla, MD, National Osteoporosis Foundation L. Joseph Melton, III, MD, National Osteoporosis Foundation Anna N.A. Tosteson, ScD, National Osteoporosis Foundation Murray Favus, MD, American Society for Bone and Mineral Research Sanford Baim, MD, International Society for Clinical Densitometry Consultants to the 2013 Update Committee: Karl Insogna, MD Douglas Kiel, MD, MPH E. Michael Leweicki, MD Harold Rosen, MD John Schousboe, MD National Osteoporosis Foundation Staff: Susan Randall, MSN, FNP-BC, Senior Director, Science and Education Amy Porter, Executive Director and CEO Judy Chandler, MPH, CHES 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
Disclosure Policy

It is the policy of NOF to ensure balance, independence, objectivity, and scientific rigor in all
sponsored publications and programs. NOF requires disclosure of any significant financial
interest or any other relationship that the Committee members have with the manufacturer(s)
of any commercial product(s). All contributors to this publication have disclosed any real or
apparent interest that may have direct bearing on the subject matter of this program. All
potential conflicts have been resolved to the satisfaction of the NOF. Medication information
included in this guidance follows the US Food and Drug Administration (FDA)-approved label.
Note to Readers

This Guide is designed to serve as a basic reference on the prevention, diagnosis and treatment
of osteoporosis in the U.S. It is based largely on updated information on the incidence and costs
of osteoporosis in the U.S. For those with low bone mass (in whom more than 50 percent of
fractures occur) the Guide incorporates an analysis from the World Health Organization (WHO)
that assesses 10-year fracture risk. The Guide utilizes an economic analysis prepared by the
National Osteoporosis Foundation in collaboration with the WHO (Dr. J. Kanis), the American
Society for Bone and Mineral Research, the International Society for Clinical Densitometry and a
broad multidisciplinary coalition of clinical experts, to indicate the level of risk at which it is
cost-effective to consider treatment. This information combined with clinical judgment and
patient preference should lead to more appropriate testing and treatment of those at risk of
fractures attributable to osteoporosis.
This Guide is intended for use by clinicians as a tool for clinical decision-making in the treatment
of individual patients. While the guidance for testing and risk evaluation comes from an analysis
of available epidemiological and economic data, the treatment information in this Guide is
based mainly on evidence from randomized, controlled clinical trials. The efficacy (fracture risk
reduction) of medications was used in the analysis to help define levels of risk at which it is cost
effective to treat.
The Guide addresses postmenopausal women and men age 50 and older. The Guide also
addresses causes of secondary osteoporosis which should be excluded by clinical evaluation.
Furthermore, all individuals should follow the universal recommendations for osteoporosis
prevention and management outlined in this Guide.
The recommendations herein reflect an awareness of the cost and effectiveness of both
diagnostic and treatment modalities. Some effective therapeutic options that would be
prohibitively expensive on a population basis might remain a valid choice in individual cases
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
under certain circumstances. This Guide cannot and should not be used to govern health policy decisions about reimbursement or availability of services. Its recommendations are not intended as rigid standards of practice. Clinicians should tailor their recommendations and, in consultation with their patients, devise individualized plans for osteoporosis prevention and treatment. Updates to this document: This document was originally written and approved in 2008. In 2010, it was updated to add information about biochemical markers and to update medication indications. The 2013 updated Clinician's Guide stresses the importance of screening vertebral imaging to diagnose asymptomatic vertebral fractures; provides updated information on calcium, vitamin D, and osteoporosis medications; addresses duration of treatment; includes an expanded discussion of the utility of biochemical markers of bone turnover and causes of secondary osteoporosis. 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
1. OSTEOPOROSIS: IMPACT AND OVERVIEW
Executive Summary

Osteoporosis is a silent disease until it is complicated by fractures—fractures that can occur
following minimal trauma. These fractures are common and place an enormous medical and
personal burden on individuals during aging and a major economic toll on the nation.
Osteoporosis can be prevented, diagnosed and treated before any fracture occurs. Importantly,
even after the first fracture has occurred, there are effective treatments to decrease the risk of
further fractures. Prevention, detection and treatment of osteoporosis should be a mandate of
primary care providers. Since NOF first published the Guide in 1999, it has become increasingly
clear that many patients are not being given appropriate information about prevention; many
patients are not having appropriate testing to diagnose osteoporosis or establish osteoporosis
risk; and, once diagnosed (by testing or by the occurrence of a fracture), too many patients are
not being prescribed any of the FDA-approved, effective therapies. This Guide offers concise
recommendations regarding prevention, risk assessment, diagnosis and treatment of
osteoporosis in postmenopausal women and men age 50 and older. It includes indications for
bone densitometry and fracture risk thresholds for intervention with pharmacologic agents. The
absolute risk thresholds at which consideration of osteoporosis treatment is recommended
were guided by a cost-effectiveness analysis.
Synopsis of Major Recommendations to the Clinician

Recommendations apply to postmenopausal women and men age 50 and older.
Universal recommendations:
• Counsel on the risk of osteoporosis and related fractures.
• Advise on a diet rich in fruits and vegetables and that includes adequate amounts of total
calcium intake (1,000 mg per day for men 50-70; 1,200 mg per day for women 51 and older and men 71 and older). • Advise on vitamin D intake (800-1,000 IU per day), including supplements if necessary for individuals age 50 and older. • Recommend regular weight-bearing and muscle-strengthening exercise to improve agility, strength, posture and balance and reduce the risk of falls and fractures. • Assess risk factors for falls and offer appropriate modifications (e.g. home safety assessment, balance training exercises, correction of vitamin D insufficiency, avoidance of certain medications and bifocals use when appropriate). CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
• Advise on cessation of tobacco smoking and avoidance of excessive alcohol intake. • Measure height annually, preferably with a wall mounted stadiometer. Diagnostic assessment:  BMD testing should be performed: o In women age 65 and older and men age 70 and older, recommend bone mineral density (BMD) testing. o In postmenopausal women and men age 50-69, recommend BMD testing based on risk o Recommend BMD testing and vertebral imaging to those who have had a fracture, to determine degree of disease severity. o BMD testing should be performed at DXA facilities using accepted quality assurance  Vertebral imaging should be performed: o In women age 65 and older and men age 70 and older, recommend vertebral imaging to diagnose vertebral fractures if T-score is -1.5 or below. o In women age 70 and men age 80 and older, recommend vertebral imaging to diagnose vertebral fractures, regardless of T-score. o In postmenopausal women and men age 50 and older with a low trauma fracture. o In postmenopausal women and men age 50-69, recommend vertebral imaging to diagnose vertebral fractures if there is height loss of 4 cm or 1.5 inches or more or recent or ongoing long-term glucocorticoid treatment. • Check for causes of secondary osteoporosis. Monitoring patients:  Perform BMD testing 1 to 2 years after initiating therapy to reduce fracture risk and every two years thereafter.  More frequent testing may be warranted in certain clinical situations. 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
 The interval between repeat BMD screening may be longer for patients without major risk factors and who have an initial T-score in the normal or upper low bone mass range. Treatment recommendations: • Initiate pharmacologic treatment in those with hip or vertebral (clinical or asymptomatic) • Initiate therapy in those with T-scores < -2.5 at the femoral neck, total hip or lumbar spine by dual-energy x-ray absorptiometry (DXA), after appropriate evaluation. • Initiate treatment in postmenopausal women and men age 50 and older with low bone mass (T-score between -1.0 and -2.5, osteopenia) at the femoral neck, total hip or lumbar spine by DXA and a 10-year hip fracture probability > 3% or a 10-year major osteoporosis-related fracture probability > 20% based on the U.S.-adapted WHO absolute fracture risk model (FRAX®; www.NOF.org and www.shef.ac.uk/FRAX). • Current FDA-approved pharmacologic options for osteoporosis are bisphosphonates (alendronate, ibandronate, risedronate and zoledronic acid), calcitonin, estrogen agonist/antagonist (raloxifene), estrogens and/or hormone therapy, parathyroid hormone 1-34 (teriparatide)and RANKL inhibitor (denosumab). • No pharmacologic therapy should be considered indefinite in duration. After the initial three to five year treatment period , a comprehensive risk assessment should be performed. There is no uniform recommendation that applies to all patients and duration decisions need to be individualized. Scope of the Problem

Osteoporosis is the most common bone disease in humans, representing a major public health
problem as outlined in Bone Health and Osteoporosis: A Report of the Surgeon General.1 It is
characterized by low bone mass, deterioration of bone tissue and disruption of bone
architecture, compromised bone strength and an increase in the risk of fracture. According to
the WHO diagnostic classification, osteoporosis is defined by BMD at the hip or lumbar spine
that is less than or equal to 2.5 standard deviations below the mean BMD of a young-adult
reference population. Osteoporosis is a risk factor for fracture just as hypertension is for stroke.
The risk of fractures is highest in those with the lowest BMD, however, the majority of fractures
occur in patients with low bone mass rather than osteoporosis, because of the large number of
individuals with bone mass in this range.
Osteoporosis affects an enormous number of people, of both sexes and all races, and its
prevalence will increase as the population ages. Based on data from the National Health and
Nutrition Examination Survey III (NHANES III), NOF has estimated that more than 10 million
Americans have osteoporosis and an additional 33.6 million have low bone density of the hip.2
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
About one out of every two Caucasian women will experience an osteoporosis-related fracture at some point in her lifetime, as will approximately one in five menAlthough osteoporosis is less frequent in African Americans, those with osteoporosis have the same elevated fracture risk as Caucasians. Medical Impact

Fractures and their complications are the relevant clinical sequelae of osteoporosis. The most
common fractures are those of the vertebrae (spine), proximal femur (hip) and distal forearm
(wrist). However, most fractures in older adults are due at least in part to low bone mass, even
when they result from considerable trauma. The most notable exceptions are those of the
fingers, toes, face and skull, which are primarily related to trauma rather than underlying bone
strength. Fractures may be followed by full recovery or by chronic pain, disability and death.5
These fractures can also cause psychosocial symptoms, most notably depression and loss of
self-esteem, as patients grapple with pain, physical limitations, and lifestyle and cosmetic
changes. Anxiety, fear and anger may also impede recovery. The high morbidity and
consequent dependency associated with these fractures strain interpersonal relationships and
social roles for patients and their families.
Hip fractures are associated with a 8.4 to 36 percent excess mortality within one year, with a
higher mortality in men than in women3; additionally, hip fractures are followed by a 2.5-fold
increased risk of future fractures.4 Approximately 20 percent of hip fracture patients require
long-term nursing home care, and only 40 percent fully regain their pre-fracture level of
independencortality is also increased following vertebral fractures, which may result in
complications that include back pain, height loss and kyphosis. Postural changes associated
with kyphosis may limit activity, including bending and reaching. Multiple thoracic fractures
may result in restrictive lung disease, and lumbar fractures may alter abdominal anatomy,
leading to constipation, abdominal pain, distention, reduced appetite and premature satiety.
The majority of vertebral fractures are initially clinically silent; however, these fractures are
often associated with symptoms of pain, disability, deformity and mortality.5 Vertebral
fractures, whether clinically apparent or silent, are major predictors of future fracture risk, up
to 5-fold for subsequent vertebral fracture and 2- to 3-fold for fractures at other sites. Wrist
fractures are less disabling but can interfere with some activities of daily living as much as hip
or vertebral fractures. Pelvic fractures and humerus fractures are also commom and contribute
to increased morbidity and mortality.
Economic Toll

Osteoporosis-related fractures create a heavy economic burden, causing more than 432,000
hospital admissions, almost 2.5 million medical office visits and about 180,000 nursing home
admissions annually in the U.The cost to the healthcare system associated with
osteoporosis-related fractures has been estimated at $17 billion for 2005; hip fractures account
for 14 percent of incident fractures and 72 percent of fracture costs.6 Due to the aging
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
population, the Surgeon General estimates that the number of hip fractures and their associated costs could double or triple by the year 2040. CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
2. BASIC PATHOPHYSIOLOGY
Bone mass in older adults equals the peak bone mass achieved by age 18-25 years minus the amount of bone subsequently lost. Peak bone mass is determined largely by genetic factors, with contributions from nutrition, endocrine status, physical activity and health during growth.7 The process of bone remodeling that maintains a healthy skeleton may be considered a preventive maintenance program, continually removing older bone and replacing it with new bone. Bone loss occurs when this balance is altered, resulting in greater bone removal than replacement. The imbalance occurs with menopause and advancing age. With the onset of menopause, the rate of bone remodeling increases, magnifying the impact of the remodeling imbalance. The loss of bone tissue leads to disordered skeletal architecture and an increase in fracture risk. Figure 1 shows the changes within cancellous bone as a consequence of bone loss. Individual trabecular plates of bone are lost, leaving an architecturally weakened structure with significantly reduced mass. Increasing evidence suggests that rapid bone remodeling (as measured by biochemical markers of bone resorption or formation) increases bone fragility and fracture risk. FIGURE 1. Micrographs of Normal vs. Osteoporotic Bone8 Normal bone Osteoporotic bone From: Dempster, DW et al., with permission of The American Society for Bone and Mineral Research.11 Bone loss leads to an increased risk of fracture that is magnified by other aging-associated declines in functioning. Figure 2 shows the factors associated with an increased risk of osteoporosis-related fractures. These include general factors that relate to aging and sex steroid deficiency, as well as specific risk factors, such as use of glucocorticoids, which cause decreased bone formation and bone loss, reduced bone quality and disruption of microarchitectural integrity. Fractures result when weakened bone is overloaded, often by falls or certain activities of daily living. 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
FIGURE 2. Pathogenesis of Osteoporosis-Related Fractures Clinical risk factors Propensity to fall Certain activities
From: Cooper C and Melton LJ, with modification.9
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
3. APPROACH TO THE DIAGNOSIS AND MANAGEMENT OF OSTEOPOROSIS
NOF recommends a comprehensive approach to the diagnosis and management of osteoporosis. A detailed history and physical examination together with BMD assessment, vertebral imaging to diagnose vertebral fractures, and, when appropriate, the WHO 10-year estimated fracture probability are utilized to establish the individual patient's fracture risk.10 Therapeutic intervention thresholds are based on NOF's economic analysis that takes into consideration the cost-effectiveness of treatments and competition for resources in the U.S.11,12 The clinician's clinical skills and past experience, incorporating the best patient-based research available, are used to determine the appropriate therapeutic intervention. The potential risks and benefits of all osteoporosis interventions should be reviewed with patients and the unique concerns and expectations of individual patients considered in any final therapeutic decision. Risk Assessment

All postmenopausal women and men age 50 and older should be evaluated for osteoporosis
risk in order to determine the need for BMD testing and/or vertebral imaging. In general, the
more risk factors that are present, the greater the risk of fracture. Osteoporosis is preventable
and treatable, but because there are no warning signs prior to a fracture, many people are not
being diagnosed in time to receive effective therapy during the early phase of the disease.
Many factors have been associated with an increased risk of osteoporosis-related fracture
(Table 1).
Conditions, Diseases and Medications That Cause or Contribute to Osteoporosis and Fractures
Lifestyle factors
High salt intake Low calcium intake Inadequate physical activity Excessive thinness Vitamin D insufficiency Excess vitamin A Smoking (active or passive) Genetic factors
Osteogenesis imperfecta Hypophosphatasia Parental history of hip fracture Gaucher's disease Idiopathic hypercalciuria Glycogen storage diseases Riley-Day syndrome Menkes steely hair syndrome Hypogonadal states
Androgen insensitivity
Hyperprolactinemia Premature ovarian failure Anorexia nervosa and bulimia Premature menopause Athletic amenorrhea 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
Turner's & Klinefelter's syndromes Panhypopituitarism Endocrine disorders
Adrenal insufficiency
Cushing's syndrome Central Adiposity Diabetes mellitus (Types 1 & 2) Hyperparathyroidism Gastrointestinal disorders
Celiac disease
Inflammatory bowel disease Primary biliary cirrhosis Pancreatic disease Hematologic disorders
Multiple myeloma
Monoclonal gammopathies Sickle cell disease Leukemia and lymphomas Systemic mastocytosis Rheumatologic and autoimmune diseases
Ankylosing spondylitis
Rheumatoid arthritis Other rheumatic and autoimmune diseases Central nervous system disorders
Epilepsy
Parkinson's disease Multiple sclerosis Spinal cord injury Miscellaneous conditions and diseases
AIDS/HIV
Congestive heart failure Muscular dystrophy Post-transplant bone disease End stage renal disease Chronic metabolic acidosis Chronic obstructive lung disease Idiopathic scoliosis Medications
Aluminum (in antacids)
Cyclosporine A and tacrolimus Proton pump inhibitors Anticoagulants (heparin) Selective serotonin reuptake (premenopausal contraception) Glucocorticoids (≥ 5 mg/d Tamoxifen® (premenopausal prednisone or equivalent for ≥ 3 Aromatase inhibitors GnRH (Gonadotropin releasing Thiazolidinediones (such as hormone) antagonists and Actos® and Avandia®) Thyroid hormones (in excess) Cancer chemotherapeutic drugs Parenteral nutrition From: The Surgeon General's Repo with modification Since the majority of osteoporosis-related fractures result from falls, it is also important to evaluate risk factors for falling (Table 2). The most important of these are personal history of falling, muscle weakness and gait, balance and visual deficits.13 Dehydration is also a risk factor. CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

TABLE 2: Risk Factors for Falls
Environmental risk factors
Lack of assistive devices in bathrooms Obstacles in the walking path Loose throw rugs Slippery conditions Low level lighting Medical risk factors
Medications causing oversedation (narcotic analgesics, anticonvulsants, psychotropics) Anxiety and agitation Orthostatic hypotension Poor vision and use of bifocals Reduced problem solving or mental acuity and diminished cognitive skills Urgent urinary incontinence Impaired transfer and mobility Vitamin D insufficiency [serum 25-hydroxyvitamin D (25(OH)D) < 30 ng/ml (75 nmol/L)] Neurological and musculoskeletal risk factors
Reduced proprioception Other risk factors
From: Health Professional's Guide to the Rehabilitation of the Patient with Osteoporosis14 Several of these risk factors have been included in the WHO 10-year fracture risk model (Table 3). As suggested by the WHO,9 this set of risk factors increases fracture risk independently of BMD and can be combined with BMD measurements to assess an individual patient's risk of future fracture. 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

TABLE 3: Risk Factors Included in the WHO Fracture Risk Assessment Model
Clinical Risk Factors Included in the FRAX Tool
• Rheumatoid arthritis • Secondary osteoporosis: Type1 (insulin dependent) diabetes, osteogenesis imperfecta in adults, untreated long-standing hyperthyroidism, hypogonadism or premature menopause (<45 years), chronic malnutrition or malabsorption and chronic liver disease • A prior osteoporotic fracture (including • Parental history of hip fracture clinical and asymptomatic vertebral fractures) • Femoral neck BMD • Current smoking • Low body mass index (BMI, kg/m2) • Alcohol intake (3 or more drinks/d) • Oral glucocorticoids >5 mg/d of prednisone for>3 months (ever) From: WHO Technical Report.9 Clinical Evaluation

Consider the possibility of osteoporosis and fracture risk based on the presence of the risk
factors and conditions outlined in Tables 1 and 3. Metabolic bone diseases other than
osteoporosis, such as hyperparathyroidism or osteomalacia, may be associated with low BMD.
Many of these diseases have very specific therapies, and it is appropriate to complete a history
and physical examination before making a diagnosis of osteoporosis on the basis of a low BMD
alone. In patients in whom a specific secondary, treatable cause of osteoporosis is being
considered (Table 1), relevant blood and urine studies (see below) should be obtained prior to
initiating therapy. Patients with recent fractures, multiple fractures or very low BMD should be
evaluated for secondary etiologies and, when considering osteomalacia or vitamin D
insufficiency, a serum 25(OH)D level should be obtained. Certain routine biochemical tests(such
as serum calcium, creatinine, etc.) are required to determine if there are contraindications to
the use of certain osteoporosis medications.
Osteoporosis affects a significant number of men yet the condition often goes undetected and
untreated. The evaluation of osteoporosis in men requires special consideration as some of the
laboratory testing to assess underlying causes in men differ from those in women. Screening
BMD and vertebral imaging recommendations for men are outlined on page 22. The 2012
Endocrine Society's "Osteoporosis in men: an Endocrine Society clinical practice guideline"
provides a detailed approach to the evaluation and treatment of osteoporosis in men.15
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

Table 4: Exclusion of Causes of Secondary Osteoporosis
Consider the Following Diagnostic Studies for Causes of Secondary Osteoporosis
Blood or Serum
 Complete blood count (CBC)  Chemistry levels (Calcium, renal function, phosphorus and magnesium)  Liver function tests  Thyroid-stimulating hormone (TSH) level  Serum 25(OH)D level  Parathyroid hormone (PTH)  Total testosterone and gonadotropin levels in younger men Consider in selected patients Serum protein electrophoresis (SPEP), serum immunofixation, serum free light chains Tissue transglutaminase antibodies Iron and ferritin levels Homocysteine in select cases  24-hour urinary calcium Consider in selected patients Protein electrophoresis (UPEP) Urinary free cortisol level Urinary histamine Diagnosis
The diagnosis of osteoporosis is established by measurement of BMD or by the occurrence of adulthood hip or vertebral fracture in the absence of major trauma (such as a motor vehicle accident or multiple story fall). Bone Mineral Density Measurement and Classification

DXA measurement of the hip and spine is the technology now used to establish or confirm a
diagnosis of osteoporosis, predict future fracture risk and monitor patients by performing serial
assessments.16 Areal BMD is expressed in absolute terms of grams of mineral per square
centimeter scanned (g/cm2) and as a relationship to two norms: compared to the BMD of an
age-, sex-, and ethnicity-matched reference population (Z-score), or compared to a young-adult
reference population of the same sex (T-score). The difference between the patient's BMD and
the mean BMD of the reference population, divided by the standard deviation (SD) of the
reference population, is used to calcualte the T-score and Z-score. Peak bone mass is achieved
in early adulthood, followed by a decline in BMD. The rate of BMD decrease accelerates in
women at menopause and continues to progress in postmenopausal women and men age 50
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

and older (see Figure 3). The BMD diagnosis of normal, low bone mass (osteopenia),
osteoporosis and severe or established osteoporosis is based on the WHO diagnostic
classification (see Table 4).

FIGURE 3. Z- and T-scores
From: ISCD Bone Densitometry Clinician Course. Lecture 5 (2008), with permission of the International Society for
Clinical Densitometry.
An individual's BMD is presented as the standard deviation above or below the mean BMD of
the reference population, as outlined in Table 5. The WHO has established the following
definitions based on BMD measurement at the spine, hip or forearm by DXA devices
TABLE 5: Defining Osteoporosis by BMD

WHO Definition of Osteoporosis Based on BMD
Within 1 SD of a young-adult reference T-score at -1.0 and above Between 1.0 and 2.5 SD below that of a T-score between -1.0 and -2.5 young-adult reference population 2.5 SD or more below that of a young- adult T-score at or below -2.5 reference population Severe or Established 2.5 SD or more below that of a young- adult T-score at or below -2.5 with one or reference population Note: Although these definitions are necessary to establish the presence of osteoporosis, they should not be used as the sole determinant of treatment decisions. BMD testing is a vital component in the diagnosis and management of osteoporosis. BMD has been shown to correlate with bone strength and is an excellent predictor of future fracture risk. Instead of a specific threshold, fracture risk increases exponentially as BMD decreases. Although available technologies measuring central (lumbar spine and hip) and peripheral skeletal sites (forearm, heel, fingers) provide site-specific and global (overall risk at any skeletal CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

site) assessment of future fracture risk, DXA measurement at the hip is the best predictor of
future hip fracture risk. DXA measurements of the lumbar spine and hip must be performed by
appropriately trained technologists on properly maintained instruments. DXA scans are
associated with exposure to trivial amounts of radiation.
In postmenopausal women and men age 50 years and older, the WHO diagnostic T-score
criteria (normal, low bone mass and osteoporosis) are applied to BMD measurement by central
DXA at the lumbar spine and femoral neckMD measured by DXA at the one-third (33
percent) radius site can be used for diagnosing osteoporosis when the hip or lumbar spine
cannot be measured. In premenopausal women, men less than 50 years of age and children,
the WHO BMD diagnostic classification should not be applied. In these groups, the diagnosis of
osteoporosis should not be made on the basis of densitometric criteria alone. The International
Society for Clinical Densitometry (ISCD) recommends that instead of T-scores, ethnic or race
adjusted Z-scores should be used, with Z-scores of -2.0 or lower defined as either "low bone
mineral density for chronological age" or "below the expected range for age" and those above -
2.0 being "within the expected range for age."17
Table 6: Additional Bone Densitometry Technologies

The following bone mass measurement technologies are capable of predicting both site-specific and overall
fracture risk. When performed according to accepted standards, these densitometric techniques are accurate and
highly reproduowever, T-scores from these technologies cannot be used according to the WHO diagnostic
classification because they are not equivalent to T-scores derived from DXA.
CT-based absorptiometry. Quantitative computed tomography (QCT) measures volumetric trabecular and cortical
bone density at the spine and hip and bone structure and bone strength measures whereas peripheral QCT (pQCT)
measures the same at the forearm or tibia. High resolution pQCT (HR-pQCT) at the radius and tibia provides
measures of volumetric density, bone structure and microarchitecture. In postmenopausal women, QCT
measurement of spine trabecular BMD can predict vertebral fractures whereas pQCT of the forearm at the ultra-
distal radius predicts hip, but not vertebral fractures. There is lack of sufficient evidence for fracture prediction in
men. QCT and pQCT are associated with greater amounts of radiation exposure than central DXA or pDXA.
The following technologies are often used for community-based screening programs because of the portability of
the equipment. Results are not equivalent to DXA and abnormal results should be confirmed by physical
examination, risk assessment and central DXA.
Peripheral dual-energy x-ray absorptiometry (pDXA) measures areal bone density of the forearm, finger or heel.
Measurement by validated pDXA devices can be used to assess vertebral and overall fracture risk in
postmenopausal women. There is lack of sufficient evidence for fracture prediction in men. pDXA is associated
with exposure to trivial amounts of radiation. pDXA is not appropriate for monitoring BMD after treatment.
Quantitative ultrasound densitometry (QUS) does not measure BMD directly but rather speed of sound (SOS)
and/or broadband ultrasound attenuation (BUA) at the heel, tibia, patella and other peripheral skeletal sites. A
composite parameter using SOS and BUA may be used clinically. Validated heel QUS devices predict fractures in
postmenopausal women (vertebral, hip and overall fracture risk) and in men 65 and older (hip and non-vertebral
fractures). QUS is not associated with any radiation exposure.
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

Who Should be Tested?

The decision to perform bone density assessment should be based on an individual's fracture
risk profile and skeletal health assessment. Utilizing any procedure to measure bone density is
not indicated unless the results will influence the patient's treatment decision. The U.S.
Preventive Services Task Force recommends testing of all women age 65 and older and younger
women whose fracture risk is equal to or greater than that of a 65-year-old white woman who
has no additional risk factors.18 BMD measurement is not recommended in children or
adolescents and is not routinely indicated in healthy young men or premenopausal women
unless there are specific risk factors for bone loss.
Table 7: Indications for BMD Testing
Consider BMD testing in the following individuals:
 Women age 65 and older and men age 70 and older, regardless of clinical risk factors  Younger postmenopausal women, women in the menopausal transition and men age 50 to 69 with clinical risk factors for fracture  Adults who have a fracture after age 50  Adults with a condition (e.g., rheumatoid arthritis) or taking a medication (e.g., glucocorticoids in a daily dose ≥ 5 mg prednisone or equivalent for ≥ three months) associated with low bone mass or bone loss Vertebral Imaging
A vertebral fracture is consistent with a diagnosis of osteoporosis, even in the absence of a
bone density diagnosis, and is an indication for pharmacologic treatment with osteoporosis
medication to reduce fracture risk. Most vertebral fractures are asymptomatic when they first
occur and often are undiagnosed for many years. Proactive vertebral imaging is the only way to
diagnose these fractures. The finding of a previously unrecognized vertebral fracture may
change the diagnostic classification, alters future fracture risk and subsequent treatment
decisions.
Independent of BMD, age and other clinical risk factors, radiographically confirmed vertebral
fractures (even if completely asymptomatic) are a sign of impaired bone quality and strength,
and a strong predictor of new vertebral and other fractures. The presence of a single vertebral
fracture increases the risk of subsequent fractures 5-fold and the risk of hip and other fractures
2- to 3- fold. Vertebral imaging can be performed using a lateral thoracic and lumbar spine x-ray
or by lateral vertebral fracture assessment (VFA), available on most modern DXA machines.
VFA can be conveniently performed at the time of BMD assessment, while conventional x-ray
may require referral to another facility.

Indications for Vertebral Imaging19
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

Because vertebral fractures are so prevalent in older individuals and most produce no acute
symptoms, vertebral imaging tests are recommended for the individuals defined in Table 8.
Once a first vertebral imaging test is done, it need only be repeated if prospective height loss is
documented or new back pain or postural change occurs.
Table 8: Indications for Vertebral Imaging
Consider vertebral imaging tests in the following individuals:
 Women age 65 and older and men age 70 and older, recommend vertebral imaging to diagnose vertebral
fractures if T-score is -1.5 or below.  Women age 70 and men age 80 and older, recommend vertebral imaging to diagnose vertebral fractures, regardless of T-score.  Postmenopausal women and men age 50 and older with a low trauma fracture.  Postmenopausal women and men age 50-69, recommend vertebral imaging to diagnose vertebral fractures if there is historical height loss of 1½ inches or more, prospective height loss of 1½ inches or more or recent or ongoing long-term glucocorticoid treatment. Additional Skeletal Health Assessment Techniques

Biochemical markers of bone turnover. Bone remodeling (or turnover) occurs throughout life
to repair fatigue damage and microfractures in bone and to maintain mineral homeostasis.
Biochemical markers of bone remodeling [e.g., resorption markers-serum C-telopeptide (CTX)
and urinary N-telopeptide (NTX) and formation markers-serum bone specific alkaline
phosphatase (BSAP), osteocalcin (OC) and aminoterminal propeptide of type 1 procollagen
(P1NP)] are best collected in the morning while patients are fasting.
Biochemical markers of bone turnover may:
 Predict risk of fracture independently of bone density.  Predict extent of fracture risk reduction when repeated after 3-6 months of treatment with FDA-approved therapies.  Predict magnitude of BMD increases with FDA-approved therapies.  Predict rapidity of bone loss.  Help determine adequacy of patient compliance and persistence with osteoporosis  Help determine duration of 'drug holiday' and when and if medication should be restarted (Data are quite limited to support this use but studies are underway). Use of WHO Fracture Risk Algorithm (FRAX®) in the U.S.

FRAX® was developed to calculate the 10-year probability of a hip fracture and the 10-year
probability of a major osteoporotic fracture (defined as clinical vertebral, hip, forearm or
proximal humerus fracture) taking into account femoral neck BMD and the clinical risk factors
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

shown in Table 3.8 The FRAX® algorithm is available at www.nof.org and at
t is also available on newer DXA machines or with software upgrades
that provide the FRAX® scores on the bone density report.
The WHO algorithm used in this Guide was calibrated to U.S. fracture and mortality rates;
hence the fracture risk figures herein are specific for the U.S. population. Economic modeling
was performed to identify the 10-year hip fracture risk above which it is cost-effective, from the
societal perspective, to treat with pharmacologic agents. The U.S.-based economic modeling is
described in one reportand the U.S.-adapted WHO algorithm and its clinical application are
illustrated in a companion reportThe latter analyses generally confirm the previous NOF
conclusion that it is cost-effective to treat individuals with a prior hip or vertebral fracture and
those with a DXA femoral neck T-score ≤ -2.5. Previous analyses have established that a lumbar
spine T-score ≤ -2.5 also warrants treatment.20
FRAX® is most useful in patients with low femoral neck BMD. Utilizing FRAX® in patients with
low BMD at the lumbar spine but a relatively normal BMD at the femoral neck underestimates
fracture risk in these individuals. Specifically, the WHO algorithm has not been validated for the
use of lumbar spine BMD. NOF recommends treatment of individuals with osteoporosis of the
lumbar spine as well as the hip.
Application of U.S.-FRAX® in the U.S.:

• FRAX® is intended for postmenopausal women and men age 50 and older; it is not intended
for use in younger adults or children, however the FRAX tool has been validated for use in men
and women from age 40 to 90.
• The FRAX® tool has not been validated in patients currently or previously treated with
pharmacotherapy for osteoporosis. In such patients, clinical judgment must be exercised in
interpreting FRAX® scores. The following examples of "untreated" patients are offered21:
a) No ET/HT or estrogen agonist/antagonist (SERM) for the past one year b) No calcitonin for the past one year c) No PTH for the past one year d) No denosumab for the past one year e) No bisphosphonate for the past two years (unless it is an oral taken for <2 months) Note: Calcium and vitamin D do NOT constitute "treatment" in this context. • FRAX can be calculated with either femoral neck BMD or total hip BMD but when available, femoral neck BMD is preferred. The use of BMD from non-hip sites is not recommended. • The WHO determined that for many causes of secondary osteoporosis, fracture risk was mediated primarily through impact on BMD.22 For this reason, when femoral neck BMD is inserted into FRAX®, the secondary osteoporosis button is automatically inactivated. CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
The therapeutic thresholds proposed in this Guide are for clinical guidance only and are not rules. All treatment decisions require clinical judgment and consideration of individual patient factors, including patient preferences, comorbidities, risk factors not captured in the FRAX model (e.g., frailty, falls), recent decline in bone density and other sources of possible under- or over-estimation of fracture risk by FRAX®. The therapeutic thresholds do not preclude clinicians or patients from considering intervention strategies for those who do not have osteoporosis by BMD (WHO diagnostic criterion of T-score ≤ -2.5), do not meet the cut points after FRAX®, or are not at high enough risk of fracture despite low BMD. Conversely, these recommendations should not mandate treatment, particularly in patients with osteopenia. Decisions to treat must still be made on a case-by-case basis. 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
4. UNIVERSAL RECOMMENDATIONS FOR ALL PATIENTS
Several interventions to reduce fracture risk can be recommended to the general population. These include an adequate intake of calcium and vitamin D, lifelong participation in regular weight-bearing and muscle-strengthening exercise, cessation of tobacco use, identification and treatment of alcoholism, and treatment of other risk factors for fracture such as impaired vision. Adequate Intake of Calcium and Vitamin D

Providing adequate daily calcium and vitamin D is a safe and inexpensive way to help reduce
fracture risk. Controlled clinical trials have demonstrated that the combination of supplemental
calcium and vitamin D can reduce the risk of fracture. A balanced diet rich in low-fat dairy
products, fruits and vegetables provide calcium as well as numerous nutrients needed for good
health. If adequate dietary calcium cannot be obtained, dietary supplementation is indicated up
to the recommended daily intake.
Advise all individuals to obtain an adequate intake of dietary calcium. Lifelong adequate
calcium intake is necessary for the acquisition of peak bone mass and subsequent maintenance
of bone health. The skeleton contains 99 percent of the body's calcium stores; when the
exogenous supply is inadequate, bone tissue is resorbed from the skeleton to maintain serum
calcium at a constant level. The NOF supports the Institute of Medicine (IOM)
recommendations that men age 50-70 consume 1,000 mg per day of calcium and that women
age 51 and older and men age 71 and older consume 1,200 mg per day of calcium.23 Intakes in
excess of 1,200 to 1,500 mg per day have limited potential for benefit and may increase the risk
of developing kidney stones, cardiovascular disease and stroke. The scientific literature is highly
controversial in this area.24,25,26,27 There is no evidence that calcium intake in excess of these
amounts confers additional bone strength.
Table 9 illustrates a simple method for estimating the calcium content of a patient's diet. The
average daily dietary calcium intake in adults age 50 and older is 600 to 700 mg per day.
Increasing dietary calcium is the first-line approach, but calcium supplements should be used
when an adequate dietary intake cannot be achieved.
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

TABLE 9. Estimating Daily Dietary Calcium Intake

STEP 1: Estimate calcium intake from calcium-rich foods*
Product
# of Servings/d Estimated calcium/ Cheese (1 oz. or 1 cubic in.) Fortified foods or juices Subtotal =
STEP 2: Total from above + 250 mg for non-dairy sources
= total dietary calcium TOTAL Calcium, in mg =
* About 75 to 80 percent of the calcium consumed in American diets is from dairy products. ** Calcium content of fortified foods varies. Vitamin D plays a major role in calcium absorption, bone health, muscle performance, balance and risk of falling. NOF recommends an intake of 800 to 1,000 international units (IU) of vitamin D per day for adults age 50 and older. Institute of Medicine Dietary Reference Intakes for vitamin D are 600 IU per day until age 70 and 800 IU per day for adults age 71 years and older. Chief dietary sources of vitamin D include vitamin D-fortified milk (400 IU per quart, although certain products such as soy milk are not always supplemented with vitamin D) and cereals (40 to 50 IU per serving or more), salt-water fish and liver. Some calcium supplements and most multivitamin tablets also contain vitamin D. Supplementation with vitamin D2 or vitamin D3 may be used. Vitamin D2 is derived from plant sources and may be used by individuals on a strict vegetarian diet. Many elderly patients are at high risk for vitamin D deficiency, including patients with malabsorption (e.g., celiac disease) or other intestinal diseases, chronic renal insufficiency, patients on medications that increase the breakdown of vitamin D (e.g. some antiseizure drugs), housebound patients, chronically ill patients and others with limited sun exposure, individuals with very dark skin, and obese individuals. There is also a high prevalence of vitamin D deficiency in patients with osteoporosis, especially those with hip fractures.28 Vitamin D deficiency is also common in patients taking osteoporosis medications. Since vitamin D intakes required to correct vitamin D deficiency are so variable among individuals, serum 25(OH)D levels should be measured in patients at risk of deficiency. Vitamin D supplements should be recommended in amounts sufficient to bring the serum 25(OH)D level to approximately 30 ng/ml (75 nmol/L) and a maintenance dose recommended to maintain this level, particularly for individuals with osteoporosis. Many patients, including those with malabsorption, will need more than the recommended 800-1,000 IU per day. The safe upper 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

limit for vitamin D intake for the general adult population was increased to 4,000 IU per day in

Treatment of Vitamin D Deficiency

Adults who are vitamin D deficient may be treated with 50,000 IU of vitamin D2 or vitamin D3
once a week or the equivalent daily dose (6000 IU vitamin D2 or vitamin D3) for 8-12 wks to
achieve a 25(OH)D blood level of approximately 30 ng/ml. This regimen should be followed by
maintenance therapy of 1500–2000 IU/d.29 In obese individuals, patients with malabsorption
syndrome and patients on medications affecting vitamin D metabolism, a higher dose may be
needed to reach and maintain target levels.30
Regular Weight-Bearing and Muscle-Strengthening Exercise

Recommend regular weight-bearing and muscle-strengthening exercise to reduce the risk of
falls and fractures. Among its many health benefits, weight-bearing and muscle-strengthening
exercise can improve agility, strength, posture and balance, which may reduce the risk of falls.
In addition, exercise may modestly increase bone density. NOF strongly endorses lifelong
physical activity at all ages, both for osteoporosis prevention and overall health, as benefits are
lost when the person stops exercising. Weight-bearing exercise (in which bones and muscles
work against gravity as the feet and legs bear the body's weight) includes walking, jogging, Tai-
Chi, stair climbing, dancing and tennis. Muscle-strengthening exercise includes weight training
and other resistive exercises. Before an individual with osteoporosis initiates a new vigorous
exercise program, such as running or heavy weight-lifting, a clinician's evaluation is appropriate.
Fall Prevention

Major risk factors for falling are shown in Table 2. In addition to maintaining adequate vitamin
D levels and physical activity, as described above, several strategies have been demonstrated to
reduce falls. These include, but are not limited to, multifactorial interventions such as individual
risk assessment, Tai Chi, home safety assessment and modification especially when done by an
occupational therapist and gradual withdrawal of psychotropic medication if possible.
Correction of vision may actually improve mobility but increase the risk of falls. Changing from
multifocal glasses to single lens glasses may reduce falls.
Hip protectors may protect an individual from injuring the hip in the event of a fall, although
the effectiveness of hip protectors on the reduction of hip fractures is not established and
evidence regarding anti-fracture benefits is inconclusive.31 There is additional uncertainty as to
which hip protector to use, as most of the marketed products have not been tested in
randomized clinical trials.
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
Cessation of Tobacco Use and Avoidance of Excessive Alcohol Intake

Advise patients to stop tobacco smoking. The use of tobacco products is detrimental to the
skeleton as well as to overall health. NOF strongly encourages a smoking cessation program as
an osteoporosis intervention.
Recognize and treat patients with excessive alcohol intake. Moderate alcohol intake has no
known negative effect on bone and may even be associated with slightly higher bone density
and lower risk of fracture in postmenopausal women. However, alcohol intake of three or more
drinks per day may be detrimental to bone health, increases the risk of falling and requires
further evaluation for alcoholism when identified.
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
5. PHARMACOLOGIC THERAPY
All patients being considered for treatment of osteoporosis should also be counseled on risk factor reduction. Patients should be counseled specifically on the importance of calcium, vitamin D and exercise as part of any treatment program for osteoporosis. Prior to initiating treatment, patients should be evaluated for causes of secondary osteoporosis and have BMD measurements by central DXA, when available. An approach to the clinical assessment of individuals at risk of osteoporosis is outlined in Table 7. The percentage of risk reductions for vertebral and non-vertebral fractures cited below are those cited in the FDA-approved Prescribing Information. In the absence of head-to-head trials, direct comparisons of risk reduction of one drug with another should be avoided. Who Should Be Considered for Treatment?

Postmenopausal women and men age 50 and older presenting with the following should be
considered for treatment:
• A hip or vertebral fracture (clinically apparent or found on vertebral imaging). There is
abundant data that patients with spine and hip fractures will have reduced fracture risk if
treated with pharmacologic therapy. This is true for patients with both low bone mass and
osteoporosis. [add all reference for pharmacologic therapy here – main trial citations}. In
patients with a hip or spine fracture, the T-score is not as important as the fracture itself in
predicting future risk of fracture and antifracture efficacy from treatment.32,33,34,35,36,37,38,39,40,41
• T-score ≤ -2.5 at the femoral neck, total hip or lumbar spine. There is abundant evidence that
patients with osteoporosis by BMD have an elevated risk of fracture and reduced fracture risk
with pharmacotherapy.42,43,44,45,46,47,48,49,50,51,52,53,54,55,56
• Low bone mass (T-score between -1.0 and -2.5 at the femoral neck or lumbar spine) and a 10-
year probability of a hip fracture ≥3% or a 10-year probability of a major osteoporosis-related
fracture ≥20% based on the U.S.-adapted WHO algorithm14,57,58,59


CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

TABLE 10: Clinical Approach to Managing Osteoporosis in Postmenopausal Women and Men
Age 50 and Older

General Principles:
 Obtain a detailed patient history pertaining to clinical risk factors for osteoporosis-related fractures and falls  Perform physical examination and obtain diagnostic studies to evaluate for signs of osteoporosis and its secondary causes  Modify diet/supplements and other clinical risk factors for fracture  Estimate patient's 10-year probability of hip and any major osteoporosis-related fracture using the U.S.-adapted  Decisions on whom to treat and how to treat should be based on clinical judgment using this Guide and all available clinical information Consider FDA-approved medical therapies based on the following:
• Vertebral fracture (clinical or asymptomatic) or hip fracture • Hip DXA (femoral neck or total hip) or lumbar spine T-score ≤ -2.5 • Low bone mass (osteopenia) and a U.S.-adapted WHO 10-year probability of a hip fracture ≥3% or 10-year probability of any major osteoporosis-related fracture ≥20% • Patient preferences may indicate treatment for people with 10-year fracture probabilities above or below these Consider non-medical therapeutic interventions:
• Modify risk factors related to falling • Consider referrals for physical and/or occupational therapy evaluation (e.g., walking aids and other assistive • Weight-bearing, muscle-strengthening and balance training Follow-up:
• Patients not requiring medical therapies at the time of initial evaluation should be clinically re-evaluated when medically appropriate • Patients taking FDA-approved medications should have laboratory and bone density re-evaluation after two years or more frequently when medically appropriate • Vertebral imaging should be repeated if there is documented height loss, new back pain, postural change or suspicious finding on chest x-ray, following the last (or first) vertebral imaging test • Regularly, and at least annually, assess compliance and persistence with the therapeutic regimen 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

U.S. FDA-Approved Drugs for Osteoporosis

Current FDA-approved pharmacologic options for the prevention and/or treatment of
postmenopausal osteoporosis include, in alphabetical order: bisphosphonates (alendronate,
alendronate plus D, ibandronate, risedronate and zoledronic acid), calcitonin, estrogens
(estrogen and/or hormone therapy), estrogen agonist/antagonist (raloxifene), parathyroid
hormone [PTH(1-34), teriparatide] and the RANKL inhibitor denosumab. Please see Prescribing
Information for specific details of their use.
The anti-fracture benefits of FDA-approved drugs have mostly been studied in women with
postmenopausal osteoporosis. There are limited fracture data in glucocorticoid-induced
osteoporosis and in men. FDA-approved osteoporosis treatments have been shown to decrease
fracture risk in patients who have had fragility fractures and/or osteoporosis by DXA.
Pharmacotherapy may also reduce fractures in patients with low bone mass (osteopenia)
without fractures, but the evidence is less strong. Thus the clinician should assess the potential
benefits and risks of therapy in each patient and the effectiveness of a given osteoporosis
treatment on reduction of vertebral and nonvertebral fractures. Note that the intervention
thresholds do not take into account the non-skeletal benefits or the risks that are associated
with specific drug use. NOF does not advocate the use of drugs not approved by the FDA for
prevention and treatment of osteoporosis. Examples of these drugs are listed in Table 11 for
information only.
Bisphosphonates

Drug efficacy:
Alendronate, brand name: Fosamax®, Fosamax Plus D, Binosto™ and generic alendronate .
Alendronate sodium is approved by the FDA for the prevention (5 mg daily and 35 mg weekly
tablets) and treatment (10 mg daily tablet, 70 mg weekly tablet,70 mg weekly tablet with 2,800
IU or 5,600 IU of vitamin D3 and 70 mg effervescent tablet ) of postmenopausal osteoporosis.
Alendronate is also approved for treatment to increase bone mass in men with osteoporosis
and for the treatment of osteoporosis in men and women taking glucocorticoids60.
Alendronate reduces the incidence of spine and hip fractures by about 50 percent over three
years in patients with a prior vertebral fracture. It reduces the incidence of vertebral fractures
by about 48 percent over three years in patients without a prior vertebral fracture.
Ibandronate, brand name: Boniva®. Ibandronate sodium is approved by the FDA for the
treatment (150 mg monthly tablet and 3 mg every three months by intravenous injection) of
postmenopausal osteoporosis. Ibandronate is available as a generic preparation in the U.S. The
oral preparations are also approved for the prevention of postmenopausal osteoporosis.
Ibandronate reduces the incidence of vertebral fractures by about 50 percent over three years,
but reduction in risk of nonvertebral fracture with ibandronate has not been documented.
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
Risedronate, brand name: Actonel®, Atelvia™ and generic risedronate. Risedronate sodium is approved by the FDA for the prevention and treatment (5 mg daily tablet; 35 mg weekly tablet; 35 mg weekly delayed release tablet; 35 mg weekly tablet packaged with 6 tablets of 500 mg calcium carbonate; 75 mg tablets on two consecutive days every month; and 150 mg monthly tablet) of postmenopausal osteoporosis. Risedronate is also approved for treatment to increase bone mass in men with osteoporosis and for the prevention and treatment of osteoporosis in men and women who are either initiating or taking glucocorticoids.61 Risedronate reduces the incidence of vertebral fractures by about 41 to 49 percent and non-vertebral fractures by about 36 percent over three years, with significant risk reduction occurring after one year of treatment, in patients with a prior vertebral fracture. Zoledronic acid, brand name: Reclast®. Zoledronic acid is approved by the FDA for the prevention and treatment (5 mg by intravenous infusion over at least 15 minutes once yearly for treatment and once every two years for prevention) of osteoporosis in postmenopausal women. It is also approved to improve bone mass in men with osteoporosis, and for the prevention and treatment of osteoporosis in men and women expected to be on glucocorticoid therapy for at least 12 months. Zoledronic acid is also indicated for the prevention of new clinical fractures in patients (both women and men) who have recently had a low-trauma (osteoporosis related) hip fracture. Zoledronic acid reduces the incidence of vertebral fractures by about 70 percent (with significant reduction at one year), hip fractures by about 41 percent and non-vertebral fractures by about 25 percent over three years. Drug administration: Alendronate (generic and Fosamax) and risedronate (Actonel) tablets must be taken on an empty stomach, first thing in the morning, with 8 ounces of plain water (no other liquid). Binosto must be dissolved in 4 ounces of room temperature water taken on an empty stomach, first thing in the morning. Delayed release risedronate (Atelvia) tablets must be taken immediately after breakfast with at least 4 ounces of plain water (no other liquid). After taking these medications, patients must wait at least 30 minutes before eating, drinking or taking any other medication. Patients should remain upright (sitting or standing) during this interval. Ibandronate must be taken on an empty stomach, first thing in the morning, with 8 ounces of plain water (no other liquid). After taking this medication, patients must wait at least 60 minutes before eating, drinking or taking any other medication. Patients must remain upright for at least one hour after taking the medication. Ibandronate, 3 mg per 3 ml prefilled syringe, is given by intravenous injection over 15 to 30 seconds, once every three months. Serum creatinine should be checked before each injection. Zoledronic acid, 5 mg in 100 ml, is given once yearly or once every two years by intravenous infusion over at least 15 minutes. Patients may be pre-treated with acetaminophen to reduce the risk of an acute phase reaction (arthralgia, headache, myalgia, fever). These symptoms 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
occurred in 32 percent of patients after the first dose, 7 percent after the second dose and 3 percent after the third dose. Drug safety: Side effects and administration of bisphosphonates. Side effects are similar for all oral bisphosphonate medications and include gastrointestinal problems such as difficulty swallowing, inflammation of the esophagus and gastric ulcer. All bisphosphonates can affect renal function and are contraindicated in patients with estimated GFR below 30-35 ml/min. Zoledronic acid is contraindicated in patients with creatinine clearance less than 35 mL/min, or in patients with evidence of acute renal impairment. Healthcare professionals should screen patients prior to administering zoledronic acid in order to identify at-risk patients. Healthcare professionals should assess renal function by monitoring creatinine clearance prior to each dose of zoledronic acid.62 There have been reports of osteonecrosis of the jaw (ONJ). ONJ is very uncommon with osteoporosis doses of these medications and much more common following high dose intravenous bisphosphonate treatment for patients with cancer. Eye inflammation can also occur. Any such complication should be reported to the healthcare provider as soon as possible. The level of risk for ONJ in patients being treated for osteoporosis with bisphosphonates is not known, but appears extremely small for at least up to five years.63 The risk of ONJ appears to increase with duration of treatment. Although rare, low trauma atypical subtrochanteric and diaphyseal femoral fractures may be associated with the long-term use of bisphosphonates (e.g. >5 years of use). Pain in the thigh or groin area often precedes these unusual fractures. Patients should be evaluated closely for risk of these unusual fractures, including proactive questioning regarding thigh and groin pain. Calcitonin

Drug efficacy:
Brand name: Miacalcin® or Fortical®. Salmon calcitonin is FDA-approved for the treatment of
osteoporosis in women who are at least five years postmenopausal.
Calcitonin reduces vertebral fracture occurrence by about 30% in those with prior vertebral
fractures but has not been shown to reduce the risk of nonvertebral fractures.
Drug administration:
200 IU delivered as a single daily intranasal spray. Subcutaneous administration by injection
also is available.
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
Drug safety: Intranasal calcitonin can cause rhinitis and epistaxis,allergic reactions, particularly in those with a history of allergy to salmon. Estrogen/Hormone Therapy (ET/HT)

Drug efficacy:
ET brand names: e.g. Climara®, Estrace®, Estraderm®, Estratab®, Ogen®, Ortho-Est®, Premarin®,
Vivelle®; HT brand names: e.g. Activella®, Femhrt®, Premphase®, Prempro®. Estrogen/hormone
therapy is approved by the FDA for the prevention of osteoporosis, relief of vasomotor
symptoms and vulvovaginal atrophy associated with menopause. Women who have not had a
hysterectomy require HT, which also contains progestin to protect the uterine lining.
The Woman's Health Initiative (WHI) found that five years of HT (Prempro®) reduced the risk of
clinical vertebral fractures and hip fractures by 34 percent and other osteoporotic fractures by
23 percent.64
Drug administration:
ET/HT is available in a wide variety of oral preparations including estrogen only, progestin only
and combination estrogen-progestin. ET/HT dosages include cyclic, sequential and continuous
regimens. If and when treatment is stopped, bone loss can be rapid and alternative agents
should be considered to maintain BMD.
Drug safety:
The Women's Health Initiative (WHI) reported increased risks of myocardial infarction, stroke,
invasive breast cancer, pulmonary emboli and deep vein thrombosis during five years of
treatment with conjugated equine estrogen and medroxyprogesterone (PremproSubsequent analysis of these data showed no increase in cardiovascular disease in women
starting treatment within 10 years of menopause. In the estrogen only arm of WHI, no increase
in breast cancer incidence was noted over 7.1 years of treatment. Other doses and
combinations of estrogen and progestins were not studied and, in the absence of comparable
data, their risks should be assumed to be comparable. Because of the risks, ET/HT should be
used in the lowest effective doses for the shortest duration to treat moderately severe
menopausal symptoms. When ET/HT use is considered solely for prevention of osteoporosis,
the FDA recommends that approved non-estrogen treatments should first be carefully
considered.


2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS


Estrogen Agonist/Antagonist (formerly known as SERMs): Raloxifene

Drug efficacy:
Raloxifene, brand name: Evista®. Raloxifene is approved by the FDA for both prevention and
treatment of osteoporosis in postmenopausal women.
Raloxifene reduces the risk of vertebral fractures by about 30 percent in patients with a prior
vertebral fracture and by about 55 percent in patients without a prior vertebral fracture over
three years. Reduction in risk of nonvertebral fracture with raloxifene has not been
documented. Raloxifene is indicated for the reduction in risk of invasive breast cancer in
postmenopausal women with osteoporosis.65,66,67,68 Raloxifene does not reduce the risk of
coronary heart disease.
Drug administration:
Available in a 60 mg tablet form to be taken with or without food.
Drug safety:
Raloxifene increases the risk of deep vein thrombosis to a degree similar to that observed with
estrogen. It can also increase hot flashes.
Parathyroid Hormone: Teriparatide

Drug efficacy:
PTH(1-34), teriparatide, brand name: Forteo®. Teriparatide is approved by the FDA for the
treatment of osteoporosis in postmenopausal women and men at high risk for fracture. It is
also approved for treatment in men and women at high risk of fracture with osteoporosis
associated with sustained systemic glucocorticoid therapy69. Teriparatide is also indicated to
increase bone mass in men with primary or hypogonadal osteoporosis who are at high risk of
fracture. Teriparatide reduces the risk of vertebral fractures by about 65 percent and non-
vertebral fractures by about 53 percent in patients with osteoporosis, after an average of 18
months of therapy.
Drug administration:
Teriparatide is an anabolic (bone-building) agent administered by 20 µg daily subcutaneous
injection. If and when treatment is stopped, bone loss can be rapid and alternative agents
should be considered to maintain BMD.
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
Drug safety: Side effects of teriparatide include leg cramps, nausea, and dizziness. Because it caused an increase in the incidence of osteosarcoma in rats (high doses, long duration treatment in the rodent), patients with an increased risk of osteosarcoma (e.g., patients with Paget's disease of bone) and those having prior radiation therapy of the skeleton, bone metastases, hypercalcemia, or a history of skeletal malignancy should not receive teriparatide therapy. The safety and efficacy of teriparatide has not been demonstrated beyond two years of treatment so teriparatide should be used for a maximum of two years. It is common practice to follow teriparatide treatment with an antiresorptive agent, usually a bisphosphonate, to maintain or further increase BMD. Receptor Activator of Nuclear Factor kappa-B (RANK) Ligand (RANKL)/ RANKL Inhibitor:
Denosumab

Drug efficacy:
Denosumab, brand name Prolia®. Denosumab is approved by the FDA for the treatment of
osteoporosis in postmenopausal women at high risk of fracture. Denosumab reduces the
incidence of vertebral fractures by about 68 percent, hip fractures by about 40 percent and
non-vertebral fractures by about 20 percent over three years. Denosumab is also indicated to
increase bone mass in men at high risk of fracture, treat bone loss in women with breast cancer
and to treat bone loss in men receiving certain treatments for prostate cancer who are at high
risk for fracture.
Drug administration:
Administered by a health professional, 60 mg every six months as a subcutaneous injection.
Drug safety:
Denosumab may cause hypocalcemia. Hypocalcemia must be corrected before starting
denosumab. Denosumab increased the risk of serious skin infections (cellulitis) and skin rash.
Denosumab has been associated with the development of ONJ both when used to treat
osteoporosis and to treat patients with cancer, although it is much more common in the latter
setting. Denosumab has also been associated with the development of atypical femur fractures.
If and when denosumab treatment is stopped, bone loss can be rapid and alternative agents
should be considered to maintain BMD.
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

Sequential and Combination Therapy

Sequential treatment with anabolic therapy followed by an antiresorptive agent is generally
preferred. Combination therapy with teriparatide and an antiresorptive can be considered in a
few clinical settings in patients with very severe osteoporosis. There are few indications for
combining two antiresorptive treatments, but such options could be considered in the short-
term in women who are experiencing active bone loss while on low dose HT for menopausal
symptoms or raloxifene for breast cancer prevention.
Duration of Treatment

No pharmacologic therapy should be considered indefinite in duration. All non-bisphosphonate
medications produce temporary effects that wane upon discontinuation. If these treatments
are stopped, benefits rapidly disappear. In contrast, bisphosphonates may allow residual effects
even after treatment discontinuation. Therefore, it may be possible to discontinue
bisphosphonates and retain long-term benefits against fracture.
Evidence of efficacy beyond five years is limited70, whereas rare safety concerns such as ONJ
and atypical femur fractures become more common beyond five years. Although there is no
extensive evidence base to guide treatment duration decisions, it is reasonable to discontinue
bisphosphonates after three to five years in people who appear to be at modest risk of fracture
after the initial treatment period. In contrast, for those who appear to be at high risk for
fracture, continued treatment with a bisphosphonate or an alternative therapy should be
considered.71
There is no uniform recommendation that applies to all patients and duration decisions need to
be individualized. After the initial three to five year treatment period, a comprehensive risk
assessment should be performed. This should include interval clinical history, particular with
respect to intercurrent fracture history and new chronic diseases or medications, as well as
height measurement, BMD testing and vertebral imaging if there has been any documented
height loss during the treatment period.


CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

Table 10: Non-FDA-Approved Drugs for Osteoporosis.
These drugs are listed for information only. These non-approved agents include:
Calcitriol. This synthetic vitamin D analogue, which promotes calcium absorption, has been approved by the FDA
for managing hypocalcemia and metabolic bone disease in renal dialysis patients. It is also approved for use in
hypoparathyroidism, both surgical and idiopathic, and pseudohypoparathyroidism. No reliable data demonstrate a
reduction of risk for osteoporotic fracture.
Genistein. An isoflavone phytoestrogen which is the main ingredient in the prescription "medical food" product
Fosteum® and generally regarded as safe by the FDA. Genistein may benefit bone health in postmenopausal
women but more data are needed to fully understand its effects on bone health and fracture risk.
Other bisphosphonates (etidronate, pamidronate, tiludronate). These medications vary chemically from
alendronate, ibandronate, risedronate and zoledronic acid but are in the same drug class. At this time, none is
approved for prevention or treatment of osteoporosis. Most of these medications are currently approved for other
conditions (e.g. Paget's disease, hypercalcemia of malignancy, myositis ossificans).
PTH(1-84). This medication is approved in some countries in Europe for treatment of osteoporosis in women. In
one clinical study PTH(1-84) effectively reduced the risk of vertebral fractures at a dose of 100mcg/d.
Sodium fluoride. Through a process that is still unclear, sodium fluoride stimulates the formation of new bone. The
quality of bone mass thus developed is uncertain, and the evidence that fluoride reduces fracture risk is conflicting
and controversial.
Strontium ranelate. This medication is approved for the treatment of osteoporosis in some countries in Europe.
Strontium ranelate reduces the risk of both spine and non-vertebral fractures, but the mechanism is unclear.
Incorporation of strontium into the crystal structure replacing calcium may be part of its mechanism of effect.
These effects have only been documented with the pharmaceutical grade agent produced by Servier. This effect
has not been rigorously studied in nutritional supplements containing strontium salts.
Tibolone.Tibolone is a tissue-specific, estrogen-like agent that may prevent bone loss and reduce menopausal
symptoms but it does not stimulate breast or uterine tissue. It is indicated in Europe for the treatment of
vasomotor symptoms of menopause and for prevention of osteoporosis, but it is not approved for use in the U.S.
Monitoring Effectiveness of Treatment

It is important to ask patients whether they are taking their medications and to encourage
continued and appropriate compliance with their osteoporosis therapies to reduce fracture
risk. It is also important to review their risk factors and encourage appropriate calcium and
vitamin D intakes, exercise, fall prevention and other lifestyle measures. Furthermore, the need
for continued medication to treat osteoporosis should be reviewed annually. Duration of
treatment must be individualized. Some patients may be able to discontinue treatment
temporarily after several years of therapy, particularly after bisphosphonate administration.
Other patients will need to continue treatment. If treatment is discontinued, serial monitoring
can include clinical assessment for fractures, falling, any interval chronic disease occurance and
consideration of serial BMD testing and possible use of biochemical markers.
Interval assessment should include clinical monitoring in addition to BMD and biochemical
markers, see below.
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS

Accurate height measurement yearly is a critical determination of osteoporosis treatment
efficacy. Patients who lose 4 cm or 1 ½ inches or more in height should have a repeat vertebral
imaging test to determine if new or additional vertebral fractures have occurred since the prior
visit.
Serial central DXA testing is an important component of osteoporosis management.
Measurements for monitoring patients should be performed in accordance with medical
necessity, expected response and in consideration of local regulatory requirements. NOF
recommends that repeat BMD assessments generally agree with Medicare guidelines of every
two years, but recognizes that testing more frequently may be warranted in certain clinical
situations.
The following techniques may be used to monitor the effectiveness of treatment:
Central DXA. Central DXA assessment of the hip or lumbar spine is the "gold standard" for serial
assessment of BMD. Biological changes in bone density are small compared to the inherent
error in the test itself, and interpretation of serial bone density studies depends on
appreciation of the smallest change in BMD that is beyond the range of error of the test. This
least significant change (LSC) varies with the specific instrument used, patient population being
assessed, measurement site, technologist's skill with patient positioning and test analysis, and
the confidence intervals used. Changes in the LSC of less than 3-6 percent at the hip and 2-4
percent at the lumbar spine from test to test may be due to the precision error of the testing
itself. Information on how to assess precision and calculate the LSC is available at

QCT. Trabecular BMD of the lumbar spine can be used to monitor age-, disease- and treatment-
related BMD changes in men and women. Precision of acquisition should be established by
phantom data and analysis precision by re-analysis of patient data.
Note: pDXA, pQCT and QUS. Peripheral skeletal sites do not respond in the same magnitude as
the spine and hip to medications and thus are not appropriate for monitoring response to
therapy at this time.
Biochemical markers of bone turnover. Suppression of biochemical markers of bone turnover
after 3-6 months of specific antiresorptive osteoporosis therapies, and biochemical marker
increases after 1-3 months of specific anabolic therapies, have been predictive of greater BMD
responses and in some cases fracture risk reduction in large clinical trials. Biochemical marker
changes in individuals must exceed the LSC in order to be clinically meaningful. The LSC is
specific to the biomarker being utilized, which is calculated by multiplying the "precision error"
of the specific biochemical marker (laboratory provided) by 2.77 (95% confidence level).
Biological variability can be reduced by obtaining samples in the early morning after an
overnight fast. Serial measurements should be made at the same time of day. In order to have
any clinical validity, sequential testing needs to be performed at the same laboratory.
CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013

Vertebral Imaging: Once the first vertebral imaging test has been performed to determine
prevalent vertebral fractures (indications above), repeat testing should be performed to
identify incident vertebral fractures if there is a change in the patient's status suggestive of new
vertebral fracture, including documented height loss, undiagnosed back pain, postural change,
or a possible finding of new vertebral deformity on chest x-ray.
2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
6. PHYSICAL MEDICINE AND REHABILITATION
Physical medicine and rehabilitation can reduce disability, improve physical function and lower the risk of subsequent falls in patients with osteoporosis. Rehabilitation and exercise are recognized means to improve function, such as activities of daily living. Psychosocial factors also strongly affect functional ability of the osteoporotic patient. Recommendations from the Health Professional's Guide to Rehabilitation of the Patient with Osteoporo • Evaluate and consider the patient's physical and functional safety as well as psychological and social status, medical status, nutritional status and medication use before prescribing a rehabilitation program. Strive for an active lifestyle, starting in childhood. • Evaluate the patient and her/his current medication use and consider possible interactions and risk for altered mental status. Intervene as appropriate. • Provide training for the performance of safe movement and safe activities of daily living, including posture, transfers, lifting and ambulation in populations with or at high risk for osteoporosis. Intervene as appropriate, e.g., with prescription for assistive device for improved balance with mobility. • Evaluate home environment for risk factors for falls and intervene as appropriate. • Implement steps to correct underlying deficits whenever possible, i.e., improve posture and balance and strengthen quadriceps muscle to allow a person to rise unassisted from a chair; promote use of assistive devices to help with ambulation, balance, lifting and reaching. • Based on the initial condition of the patient, provide a complete exercise recommendation that includes weight-bearing aerobic activities for the skeleton, postural training, progressive resistance training for muscle and bone strengthening, stretching for tight soft tissues and joints and balance training. • As long as principles of safe movement are followed, walking and daily activities, such as housework and gardening, are practical ways to contribute to maintenance of fitness and bone mass. Additionally, progressive resistance training and increased loading exercises, within the parameter of the person's current health status, are beneficial for muscle and bone strength. Proper exercise may improve physical performance/function, bone mass, muscle strength and balance, as well as reduce the risk of falling. • Advise patients to avoid forward bending and exercising with trunk in flexion, especially in combination with twisting. CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
• Avoid long-term immobilization and recommend partial bed rest (with periodic sitting and ambulating) only when required and for the shortest periods possible. • In patients with acute vertebral fractures or chronic pain after multiple vertebral fractures, the use of trunk orthoses (e.g., back brace, corset, posture training support devices) may provide pain relief by reducing the loads on the fracture sites and aligning the vertebra. However, long-term bracing may lead to muscle weakness and further de-conditioning. • Effective pain management is a cornerstone in rehabilitation from vertebral fractures. Pain relief may be obtained by the use of a variety of physical, pharmacological and behavioral techniques with the caveat that the benefit of pain relief should not be outweighed by the risk of side effects such as disorientation or sedation which may result in falls. • Individuals with recent, painful vertebral fractures that fail conservative management may be candidates for emerging interventions, such as kyphoplasty or vertebroplasty, when performed by experienced practitioners. CONCLUSIONS AND REMAINING QUESTIONS
The Guide has focused on the prevention, diagnosis and treatment of osteoporosis in postmenopausal women and men age 50 and older using the most common existing diagnostic and treatment methods available. Much is known about osteoporosis in this population. However, many additional issues urgently need epidemiologic, clinical andeconomic research. For example: • How can we better assess bone strength using non-invasive technologies and thus improve identification of patients at high risk for fracture? • There is the need to expand the WHO algorithm to incorporate information on lumbar spine • How can children, adolescents and young adults maximize peak bone mass? • What are the precise components (type, intensity, duration, frequency) of an effective exercise program for osteoporosis prevention and treatment? • What should be done to identify and modify risk factors for falling, and what would be the magnitude of effect on fracture risk in a population? • How effective are different FDA-approved treatments in preventing fractures in patients with moderately low bone mass? • What approaches are most effective in treating osteoporosis in disabled populations? 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
• How can we make the diagnosis of vertebral fractures more accurate and consistent, particularly mild fractures? • How long should antiresorptive therapies be continued, and are there long-term side effects • Are combination therapies useful and, if so, which are the useful drug combinations and when should they be used? • Can we identify agents that will significantly increase bone mass and return bone structure to • Should we treat patients to a certain goal and then reconsider type and/or dose of therapy? If so, what should that goal be? • How should therapeutic agents be sequentially prescribed in order to maximize benefits and minimize risks over the lifespan of the patient? NOF is committed to continuing the effort to answer these and other questions related to this debilitating disease, with the goal of eliminating osteoporosis as a threat to the health of present and future generations. For additional resources on osteoporosis and bone health visit www.nof.org or call 1-800-231-4222. CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
GLOSSARY
Alendronate (Fosamax®, Binosto™): A bisphosphonate approved by the U.S. Food and Drug Administration for prevention and treatment of osteoporosis; accumulates and persists in the bone. Studies indicate about a 50 percent reduction in vertebral and hip fractures in patients with osteoporosis. Biochemical markers of bone turnover: Biochemical markers of bone remodeling [e.g., resorption markers - serum C-telopeptide (CTX) and urinary N-telopeptide (NTX) and formation markers - serum bone specific alkaline phosphatase (BSAP), osteocalcin (OC) and and aminoterminal propeptide of type 1 procollagen (P1NP)] can be measured in the serum and urine. Elevated levels of markers of bone turnover may predict bone loss, and declines in the levels of markers after 3-6 months of treatment may be predictive of fracture risk reduction. Bone mineral density (BMD): A risk factor for fractures. By DXA, BMD is expressed as the amount of mineralized tissue in the area scanned (g/cm2); with QCT, BMD is expressed as the amount per volume of bone (mg/cm3). Hip BMD by DXA is considered the best predictor of hip fracture; it appears to predict other types of fractures as well as measurements made at other skeletal sites. Lumbar spine BMD may be preferable to assess changes early in menopause and after bilateral ovariectomy. Calcitonin (Miacalcin® or Fortical®): A polypeptide hormone that inhibits the resorptive activity of osteoclasts. Calcitriol: A synthetic form of 1,25-dihydroxyvitamin D3, a hormone that aids calcium absorption and mineralization of the skeleton. Its effectiveness as a treatment for osteoporosis is still uncertain. Calcium: A mineral that plays an essential role in development and maintenance of a healthy skeleton. If intake is inadequate, calcium is mobilized from the skeleton to maintain a normal blood calcium level. In addition to being a substrate for bone mineralization, calcium has an inhibitory effect on bone remodeling through suppression of circulating parathyroid hormone. Cancellous bone: The spongy, or trabecular, tissue in the middle of bone (e.g., vertebrae) and at the end of the long bones. Cortical bone: The dense outer layer of bone. Cost-effectiveness analysis: As utilized in this Guide, a quantitative analysis that considers the value of treatment by comparing average costs and average health outcomes (quality-adjusted life expectancy) for patients who are treated for osteoporosis relative to untreated patients. 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
Denosumab. A RANKL inhibitor approved by the FDA for the treatment of osteoporosis in postmenopausal women at high risk of fracture. Denosumab reduces the incidence of vertebral fractures by about 68 percent, hip fractures by about 40 percent and non-vertebral fractures by about 20 percent over three years. Dual-energy x-ray absorptiometry (DXA): A diagnostic test used to assess bone density at various skeletal sites using radiation exposure about one-tenth that of a standard chest x-ray. Central DXA (lumbar spine, hip) is the preferred measurement for definitive diagnosis of osteoporosis and for monitoring the effects of therapy. Estrogen: One of a group of steroid hormones that control female sexual development; directly affects bone mass through estrogen receptors in bone, reducing bone turnover and bone loss. Indirectly increases intestinal calcium absorption and renal calcium conservation and, therefore, improves calcium balance. See hormone therapy. Estrogen agonists/antagonists: A group of compounds that are selective estrogen receptor modulators, formerly known as SERMs. Exercise: An intervention long associated with healthy bones, despite limited evidence for significant beneficial effect on bone mineral density or fracture risk reductions. Studies evaluating exercise are ongoing; however, enough is known about the positive effect of exercise on fall prevention to support its inclusion in a comprehensive fracture prevention program. Fluoride: A compound that stimulates the formation of new bone by enhancing the recruitment and differentiation of osteoblasts. Studies show varying effects on BMD depending upon the preparation, dose, measurement site and outcomes assessed. Fracture: Breakage of a bone, either complete or incomplete. Most studies of osteoporosis focus on hip, vertebra and/or distal forearm fractures. Vertebral fractures include morphometric as well as clinical fractures. FRAX®: The World Health Organization Fracture Risk Assessment Tool. www.NOF.org and www.shef.ac.uk/FRAX Hormone/estrogen therapy (HT/ET) (HT – Activella®, Femhrt®, Premphase®, Prempro®; ET – Climara®, Estrace®, Estraderm®, Estratab®, Ogen®, Ortho-Est®, Premarin®, Vivelle®): HT is a general term for all types of estrogen replacement therapy when given along with progestin, cyclically or continuously. HT is generally prescribed for women after natural menopause or bilateral ovariectomy. ET is prescribed for postmenopausal women who have had a hysterectomy. Studies indicate that five years of HT may decrease vertebral fractures by 35 to 50 percent and non-vertebral fractures by about 25 percent. Ten or more years of use might be expected to decrease the rate of all fractures by about 50 percent. CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
Ibandronate (Boniva®): A bisphosphonate approved by the FDA for the prevention and treatment of postmenopausal osteoporosis. Ibandronate reduces the incidence of vertebral fractures by about 50 percent over three years. Least significant change (LSC): A measure utilized as part of DXA precision assessment that helps to determine if a BMD change can be ascribed to treatment effects or is due to measurement error. Low bone mass (osteopenia): The designation for bone density between 1.0 and 2.5 standard deviations below the mean BMD of a young-adult reference population (T-score between -1.0 and -2.5). Modeling: The term for skeletal processes that occur during growth (e.g., linear growth, cortical apposition and cancellous modification) and increase bone mass. Non-vertebral fractures: Fractures of the hip, wrist, forearm, leg, ankle, foot and other sites. Normal bone mass: The designation for bone density within 1 standard deviation of the mean BMD of a hyoung-adult reference population (T-score at -1.0 and above). Osteopenia: See low bone mass. Osteoporosis: A chronic, progressive disease characterized by low bone mass, microarchitectural deterioration of bone tissue and decreased bone strength, bone fragility and a consequent increase in fracture risk; bone density 2.5 or more standard deviations below the mean BMD of a young-adult reference population (T-score at or below -2.5). Peak bone mass: The maximum bone mass accumulated during young adult life. Peripheral DXA: A DXA test used to assess bone density in the forearm, finger and heel. Physiatrist: A physician who specializes in medicine and rehabilitation, or physiatry. Previous fracture: A risk factor for future fractures, defined here as a history of a previous fracture after age 40. PTH(1-34), teriparatide, (Forteo®): An anabolic therapy approved for the treatment of osteoporosis. The pivotal study indicates a 65 percent reduction in vertebral fractures and a 53 percent reduction in non-vertebral fractures after 18 months of therapy in patients with osteoporosis. Quantitative computed tomography (QCT): A diagnostic test used to assess bone density; reflects three-dimensional BMD. Usually used to assess the lumbar spine, but has been adapted 2013 CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS
for other skeletal sites. It is also possible to measure trabecular and cortical bone density in the periphery by peripheral QCT (pQCT). Quantitative ultrasound densitometry (QUS): A diagnostic test used to assess bone density at the calcaneus or patella. Ultrasound measurements correlate only modestly with other assessments of bone density in the same patient, yet some prospective studies indicate that ultrasound may predict fractures as well as other measures of bone density. Raloxifene (Evista®): An estrogen agonist/antagonist (or selective estrogen receptor modulator) approved by the FDA for prevention and treatment of osteoporosis. It lowers the risk of vertebral fracture by about 30 percent in patients with and about 55 percent in patients without prior vertebral fracture. RANKL: Receptor Activator of Nuclear Factor kappa-B (RANK) Ligand (RANKL) Remodeling: The ongoing dual processes of bone formation and bone resorption after cessation of growth. Resorption: The loss of substance (in this case, bone) through physiological or pathological means. Risedronate (Actonel®, Atelvia®): A bisphosphonate approved by the FDA for prevention and treatment of osteoporosis. It lowers the risk of vertebral fracture by about 41-49 percent and non-vertebral fractures by about 36 percent. Risk factors: For osteoporotic fractures, includes low BMD, parental history of hip fracture, low body weight, previous fracture, smoking, excess alcohol intake, glucocorticoid use, secondary osteoporosis (e.g., rheumatoid arthritis) and history of falls. These readily accessible and commonplace factors are associated with the risk of hip fracture and, in most cases, with that of vertebral and other types of fracture as well. Secondary osteoporosis: Osteoporosis that is drug-induced or caused by disorders such as hyperthyroidism, renal disease or chronic obstructive pulmonary disease. Severe or "established" osteoporosis: Osteoporosis characterized by bone density that is 2.5 standard deviations or more below the young normal mean (T-score at or below -2.5), accompanied by the occurrence of at least one fragility-related fracture. Standard deviation (SD): A measure of variation of a distribution. T-score: In describing BMD, the number of standard deviations above or below the mean BMD of a young-adult reference population of the same sex. Teriparatide: See PTH(1-34), teriparatide, (Forteo®). CLINICIAN'S GUIDE TO PREVENTION AND TREATMENT OF OSTEOPOROSIS 2013
Vitamin D: A group of fat-soluble sterol compounds that includes ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3). These compounds are ingested from plant and animal sources; cholecalciferol is also formed in skin on exposure to ultraviolet light. When activated in the liver and then the kidney, vitamin D promotes calcium absorption and bone mass. Vitamin D replacement also increases muscle strength and lowers risk of falling. A 25(OH)D level of = 30 ng/ml (75 nmol/L) is considered by many to be optimal. Zoledronic acid (Reclast®): A bisphosphonate approved by the FDA for treatment of postmenopausal osteoporosis. It lowers risk of vertebral fractures by about 70 percent, hip fractures by about 41 percent and non-vertebral fractures by about 25 percent. Z-score: In describing BMD, the number of standard deviations above or below the mean BMD for persons of the same age, sex, and ethnicity. KEY REFERENCES
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70 Black DM, Schwartz AV, Ensrud KE, et al;FLEX Research Group. Effects of continuing or stopping alendronate after 5 years of treatment: The Fracture Intervention Trial Long-term Extension (FLEX): a randomized trial. JAMA. 2006;296(24):2927-2938. 71 Black DM, Bauer DC, Schwartz AV, Cummings SR, Rosen CJ. Continuing bisphosphonate treatment for osteoporosis--for whom and for how long? N Engl J Med. 2012;366(22):2051-2053. National Osteoporosis Foundation 1150 17th St., NW Suite 850 Washington, DC 20036 (202) 223-2226 main (202) 223-2237 fax www.nof.org The National Osteoporosis Foundation is the leading consumer and community-focused health organization dedicated to the prevention of osteoporosis and broken bones, the promotion of strong bones for life and the reduction of human suffering through programs of public and clinician awareness, education, advocacy and research. B120-0213

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