Bone Density Test and Osteoporosis Screening After 65

Bone Density Test and Osteoporosis Screening After 65

Key takeaways

• USPSTF recommends osteoporosis screening for women 65 and older (Grade B).[1]
• USPSTF also recommends screening for postmenopausal women younger than 65 who have 1 or more risk factors and are at increased risk by clinical risk assessment (Grade B).[1]
• For men, USPSTF says evidence is insufficient (I statement) — decide with your clinician.[1]
• The usual test is a central DXA (dual-energy X-ray absorptiometry) of the hip and/or spine.[1][2]
• A T-score of −2.5 or lower may mean osteoporosis; −1 to −2.5 is often called osteopenia (low bone mass).[3]

Who should get a bone density test

Source: USPSTF osteoporosis screening recommendation.[1]

These recommendations apply to adults 40+ without known osteoporosis or a history of fragility fractures. They do not apply to secondary osteoporosis from certain diseases or long-term medicines (for example high-dose glucocorticoids) — those people need individualized care.[1]

Risk factors clinicians often weigh (women under 65)

USPSTF notes risk factors that include (examples):[1]

• Low body weight
• Parental history of hip fracture
• Cigarette smoking
• Excess alcohol use
• Menopausal status (already postmenopausal)

For postmenopausal women under 65 with one or more of these, clinicians then use a clinical risk assessment tool (examples USPSTF discusses include OST, ORAI, or FRAX) to decide whether DXA is warranted.[1]

NIAMS summarizes the Task Force approach as: women over 65, and younger postmenopausal women at increased risk; more research is needed before a firm recommendation for men.[2][3]

What a DXA test is like

NIAMS describes DXA as a quick, painless, noninvasive test that uses low-level X-rays while you lie on a cushioned table. It usually measures BMD at the hip and spine — sites that break most often when bones are weak.[2]

Peripheral DXA (wrist or heel) may be used in some settings, but NIAMS notes results may not be as useful for predicting future fractures or monitoring treatment as central hip/spine DXA.[2]

How to read the numbers (T-score)

For postmenopausal women and men 50+, results are often reported as a T-score — how your bone density compares with that of a healthy young adult.[3]

Source: NIAMS “Bone Mineral Density Tests: What the Numbers Mean.”[3]

NIAMS also notes that fracture risk rises about 1.5 to 2 times with each 1-point drop in T-score.[3]

Z-scores compare you with people of your age, sex, and ethnicity. NIAMS says a Z-score of −2.0 or less means low bone density for your peer group and may point clinicians toward secondary causes.[3]

Always review results with your clinician. Diagnosis and treatment also consider age and other fracture risks — not the T-score alone.[3]

Why screening matters

USPSTF notes osteoporotic fractures can mean pain, loss of independence, and higher risk of later fractures and death. Only about 40% to 60% of people who break a hip regain their prior mobility and daily-living ability.[1]

Among community-dwelling U.S. adults 50+, age-adjusted osteoporosis prevalence is about 12.6%. Among people 65+, prevalence is about 27.1% in women and 5.7% in men.[1]

After the test: practical next steps (original checklist)

1. ☐ Ask for a written copy of your T-scores (hip and spine).
2. ☐ Ask: “Do I have osteoporosis, osteopenia, or normal density?”
3. ☐ Ask whether a fracture-risk tool (for example FRAX) was used with or without BMD.
4. ☐ Review fall risk: vision, meds that cause dizziness, home hazards.
5. ☐ Ask about calcium and vitamin D from food first, then supplements if needed.
6. ☐ Ask about weight-bearing and strength exercise that is safe for your bones.
7. ☐ If medicine is offered, ask benefits, side effects, and how long you would take it.

Calcium and vitamin D (food targets)

NIAMS (citing NIH Office of Dietary Supplements) lists daily targets that include:[2]

Talk with your clinician before high-dose supplements. USPSTF has separate recommendations on vitamin D/calcium for fracture prevention that are being updated — do not self-prescribe megadoses.[1]

For food sources and daily amounts of calcium, vitamin D, and protein, see Protein and vitamin D for seniors.

Falls and strength

Broken bones after 65 often start with a fall. Strength and balance training matter as much as the DXA number.

Chair-strength / fall-prevention course placeholder:

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FAQ

I am a man age 70. Should I get a DXA? USPSTF cannot recommend for or against routine screening in men (I statement). Some specialty groups suggest testing older men; decide with your clinician based on falls, prior fractures, steroids, and other risks.[1][2]

Is a heel ultrasound enough? NIAMS says if a heel ultrasound suggests bone loss, you still need a DXA to diagnose and plan care.[2]

How often should I repeat the test? USPSTF notes evidence on ideal intervals is limited; some research suggests repeating every 4 to 8 years does not always add much prediction accuracy, and intervals may be shorter when baseline T-scores are already low. Follow your clinician’s plan.[1]

Does osteopenia always need medicine? Not always. Many people start with nutrition, exercise, fall prevention, and risk-factor changes. Medicine decisions depend on T-score plus fracture history and overall risk.[1][2][3]

Sources

1. U.S. Preventive Services Task Force. Osteoporosis to Prevent Fractures: Screening. Final Recommendation Statement. January 14, 2025. https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/osteoporosis-screening. Accessed October 29, 2026.
2. National Institute of Arthritis and Musculoskeletal and Skin Diseases. Osteoporosis: Diagnosis, Treatment, and Steps to Take. NIAMS/NIH. https://www.niams.nih.gov/health-topics/osteoporosis/diagnosis-treatment-and-steps-to-take. Accessed October 29, 2026.
3. National Institute of Arthritis and Musculoskeletal and Skin Diseases. Bone Mineral Density Tests: What the Numbers Mean. NIAMS/NIH. https://www.niams.nih.gov/health-topics/bone-mineral-density-tests-what-numbers-mean. Accessed October 29, 2026.

Disclaimer

This article is for general education only and is not medical, legal, or financial advice. Talk to your doctor, a licensed attorney, or a SHIP counselor (Medicare) about your situation. In an emergency, call 911.

Attribution

Portions of this page are adapted from "HowToLiveBetter" (高性价比人生指南) by eternity4719, https://github.com/eternity4719/HowToLiveBetter, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Changes: topic and evidence approach adapted from Chapter 01 (bone health / screening); rewritten for the U.S. context and re-sourced to USPSTF and NIH/NIAMS. Not a direct translation.