SYNTHETIC DEMONSTRATION — no real student or patient. Not a medical device.

endocrine

DEXA Scan Results Explained: T-Score & Bone Density

A DEXA scan T-score between -1.0 and -2.5 indicates osteopenia (low bone density); -2.5 or lower meets the threshold for osteoporosis. Your clinician uses the T-score alongside age, sex, and other risk factors to calculate fracture risk and determine whether treatment is recommended.

Talk to a clinician

Gale can match you with a licensed clinician for a visit.

Find care →

What is a DEXA scan and how does it work?

Dual-energy X-ray absorptiometry — DEXA or DXA — is the standard test for measuring bone mineral density. It uses two low-dose X-ray beams aimed at the hip and lumbar spine to calculate how dense and strong your bones are. The scan is painless, takes about 10 to 20 minutes, and exposes you to very little radiation — far less than a standard chest X-ray 1.

The result is expressed as a T-score, which forms the basis of most clinical treatment decisions for osteoporosis in postmenopausal women and men over 50.

What does the T-score mean?

The T-score compares your bone mineral density to that of a healthy young adult at peak bone mass (approximately age 30) of the same sex 1.

| T-score | Category | What it means | |---|---|---| | -1.0 and above | Normal | Within the expected range | | -1.0 to -2.5 | Osteopenia | Below average but not yet osteoporosis | | -2.5 or lower | Osteoporosis | Significantly low — elevated fracture risk |

The World Health Organization established these thresholds specifically for postmenopausal women and men over 50 using hip or spine measurements 1.

A Z-score compares your density to people of your own age and sex. A Z-score below -2.0 suggests bone loss greater than expected for your age and may prompt investigation into secondary causes.

What is the difference between osteopenia and osteoporosis?

Osteopenia means bone density is lower than average for a young adult — it is not a disease in itself. Many people have osteopenia throughout their lives without ever fracturing a bone. The term identifies people who may benefit from lifestyle changes and monitoring.

Osteoporosis means bone density has fallen to a level where fracture risk is substantially elevated 12. Even so, a T-score alone does not determine whether you need medication — a low-trauma fracture (a fall from standing height, or a spontaneous vertebral fracture) establishes the diagnosis regardless of your DEXA result. The most consequential fractures are at the hip and spine; hip fractures in particular can have serious and lasting effects on mobility.

How does my clinician decide whether I need treatment?

Treatment decisions go beyond the T-score. Most clinicians use the FRAX tool — a validated WHO fracture risk calculator — to estimate your 10-year probability of a major osteoporotic fracture. FRAX incorporates age, sex, weight, prior fracture history, family history of hip fracture, smoking, alcohol use, steroid use, and other risk factors.

The Endocrine Society recommends pharmacological treatment when 1: - A prior hip or vertebral fracture has occurred - T-score is -2.5 or lower at the hip or spine - T-score is between -1.0 and -2.5 and the FRAX 10-year probability of a major osteoporotic fracture exceeds threshold (typically ≥20% for major fracture or ≥3% for hip fracture in the US)

For people in the osteopenia range with a low FRAX score, the focus is usually on lifestyle measures and monitoring rather than medication 1.

Who should get a DEXA scan?

The US Preventive Services Task Force recommends bone density screening for 2: - All women aged 65 and older - Postmenopausal women under 65 whose 10-year fracture risk equals or exceeds that of a 65-year-old white woman with no additional risk factors

Many clinicians also screen men aged 70 and older and younger adults with significant risk factors such as prolonged steroid use, prior fragility fracture, hypogonadism, eating disorders, celiac disease, or chronic kidney disease 1.

What can you do about low bone density?

Regardless of whether medication is recommended, these measures support bone health 13:

  • Calcium and vitamin D. Adequate intake supports bone maintenance; your clinician can check whether supplementation is appropriate for you
  • Weight-bearing and resistance exercise. Walking, dancing, stair climbing, and strength training help maintain bone density
  • Fall prevention. For people with osteoporosis, preventing falls is as important as treating bone density — balance training, home safety reviews, and vision checks all reduce fracture risk
  • Avoiding smoking and excessive alcohol. Both are established risk factors for accelerated bone loss

Medications (bisphosphonates, denosumab, and others) are available for people who meet treatment thresholds. The right choice depends on fracture risk, kidney function, and other individual factors 1.

Who manages bone health — and can Gale help?

DEXA scans are ordered and interpreted by primary care physicians, gynecologists, endocrinologists, rheumatologists, and geriatricians. If your scan shows osteoporosis or if you have had a fragility fracture, a specialist in bone health is appropriate. Gale can help you understand your results, discuss lifestyle changes, and coordinate a referral if your T-score and FRAX score suggest treatment is warranted.

Common questions

My T-score is -1.8. Do I need medication?

A T-score of -1.8 falls in the osteopenia range. Whether medication is needed depends on your 10-year fracture risk (calculated by FRAX), your age, prior fracture history, and other risk factors — not the T-score alone. Many people with a T-score of -1.8 do not need medication and can focus on lifestyle measures and monitoring.

How often should I have a DEXA scan?

For most postmenopausal women starting treatment, a repeat scan every one to two years is common to assess response. For those in the osteopenia range who are not on medication, every two to three years is a typical interval — though your clinician may adjust this based on your individual risk.

Can men get osteoporosis?

Yes. Men develop osteoporosis too, usually about a decade later than women on average. Risk factors include age over 70, prolonged corticosteroid use, low testosterone, smoking, excessive alcohol, and prior fragility fracture. DEXA is not routinely recommended for all men by the USPSTF, but many guidelines support screening men at higher risk.

Does osteopenia always progress to osteoporosis?

Not necessarily. The rate of bone loss varies significantly between people, and many individuals with osteopenia maintain stable bone density for years. Lifestyle measures — adequate calcium and vitamin D, weight-bearing exercise, not smoking — can slow or even partly reverse bone loss in some cases.

Talk to a clinician

Gale can match you with a licensed clinician for a visit.

Find care →

When to seek care

  • —A fall from standing height that causes significant pain in the spine, hip, or wrist — this may indicate a fragility fracture even if you do not recall a hard impact
  • —Sudden new back pain, especially in older adults — vertebral compression fractures can occur without a clear injury
  • —Height loss of more than 1.5 inches over time, which may suggest silent vertebral fractures

If you have fallen and cannot bear weight, have severe pain, or suspect a fracture, go to an emergency department or urgent care promptly.

DEXA scan interpretation and fracture risk assessment require a clinical evaluation. This article provides general education only. For bone density evaluation or treatment decisions, Gale recommends working with a qualified clinician — an endocrinologist, rheumatologist, or primary care physician with expertise in bone health.

References

  1. 1.Eastell R, Rosen CJ, Black DM, Cheung AM, Murad MH, Shoback D (2019). Pharmacological Management of Osteoporosis in Postmenopausal Women: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism. doi:10.1210/jc.2019-00221 ✓T-score thresholds for osteoporosis and osteopenia, FRAX-based treatment decision framework, pharmacological options for postmenopausal women, lifestyle recommendations for bone health
  2. 2.US Preventive Services Task Force (2018). Screening for Osteoporosis to Prevent Fractures: US Preventive Services Task Force Recommendation Statement. JAMA. doi:10.1001/jama.2018.7498 ✓USPSTF Grade B recommendation for bone density screening in women aged 65 and older and in younger postmenopausal women at elevated fracture risk
  3. 3.National Institute of Diabetes and Digestive and Kidney Diseases (2023). Diabetic Kidney Disease. NIDDK Health Information. link ✓Context on chronic conditions (diabetes, chronic kidney disease) as secondary causes of bone loss warranting earlier DEXA screening

3 sources, numbered by first appearance. General health information, not medical advice — synthetic demonstration content.