Preventative measures to reduce osteoporotic fractures
Approved drug therapies. The majority of studies were conducted in postmenopausal women. Bisphosphonates, most commonly used and studied, significantly reduced vertebral and nonvertebral fractures but not hip fractures (possibly because of underpowered studies). Raloxifene and parathyroid hormone reduced vertebral fractures but not nonvertebral fractures. Denosumab significantly reduced all three types of fractures. A 2011 review identified that estrogen reduced vertebral fractures, but no new studies were identified for the current review. Data from the Women’s Health Initiative show that women receiving estrogen with or without progesterone had an elevated risk of stroke, venous thromboembolism, and gallbladder disease; their risk for urinary incontinence was increased during the first year of follow-up. In addition, women receiving estrogen plus progestin had a higher risk of invasive breast cancer, coronary heart disease, and probable dementia. The risk of serious adverse events, upper-gastrointestinal events, or cardiovascular events associated with the most common class of medications used, bisphosphonates, is small. Evidence on the effectiveness of medications to treat osteoporosis in men is lacking (only two studies conducted).
Exercise. Engagement in 120-300 minutes of weekly moderate-intensity aerobic activity can reduce the risk of hip fractures, and performance of weekly balance and muscle-strengthening activities can help prevent falls in older adults.
Supplements. In a separate recommendation, USPSTF recommends against daily supplementation with less than 400 IU of vitamin D and less than 1,000 mg of calcium for the primary prevention of fractures in community-dwelling, postmenopausal women. They found insufficient evidence on supplementation with higher doses of vitamin D and calcium in postmenopausal women, or at any dose in men and premenopausal women.
Recommendations from others
The National Osteoporosis Foundation and the International Society for Clinical Densitometry recommend BMD testing in all women older than 65 years, all men over 70 years, postmenopausal women younger than 65 years, and men aged 50-69 years with increased risk factors. The American Academy of Family Physicians recommends against DXA screening in women younger than 65 years and men younger than 70 years with no risk factors.
The bottom line
For all women older than 65 years and postmenopausal women younger than 65 years who are at increased risk, screen for and treat osteoporosis to prevent fractures. For men, there is insufficient evidence to screen.
Dr. Shrestha is a second-year resident in the Family Medicine Residency Program at Abington (Pa.) - Jefferson Health. Dr. Skolnik is a professor of family and community medicine at Jefferson Medical College, Philadelphia, and an associate director of the family medicine residency program at Abington - Jefferson Health.
References
1. U.S. Preventative Services Task Force. JAMA. 2018 Jun 26;319(24):2521-31.
2. U.S. Preventative Services Task Force. JAMA. 2018 Jun 26;319(24):2532-51.