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Meno Health. Clinical Evidence.

#175: Bone density testing at menopause: when is a DXA scan useful?

Osteoporosis can develop for years without pain. Should you have your bone density measured at menopause? First have your personal fracture risk assessed, then decide with a clinician whether DXA is useful. The test can fill an information gap, but not every woman needs an immediate scan and the result never explains risk alone.

What does a bone density test measure?

The standard test is dual-energy X-ray absorptiometry, or DXA. It measures bone mineral density at the hip and lumbar spine. This identifies low bone mass, but osteoporosis is more than one number. Age, previous fractures, falls, medicines and medical conditions also influence risk.

Why does bone health matter during menopause?

Oestrogen helps slow bone breakdown. Around the final period, levels fall and bone mass may decline faster without symptoms. Premature or early menopause, removal of both ovaries or prolonged low oestrogen add risk. Menopause is therefore a useful time for prevention and a structured risk assessment.

Who is more likely to benefit from a DXA scan?

  • You have had a low-trauma fracture, such as a break after a fall from standing height, or a vertebral fracture is suspected.
  • You had an early menopause, have low body weight, have lost height or a parent had a hip fracture.
  • You use oral corticosteroids for a prolonged period or take another medicine that can weaken bone.
  • You have rheumatoid arthritis, coeliac disease, an overactive thyroid, diabetes, chronic kidney disease or another secondary cause.
  • Older age, repeated falls, smoking or high alcohol intake raise your combined risk enough to make testing useful.

Guidelines vary by country. The 2025 US task force recommends screening women aged 65 or over and younger postmenopausal women at increased risk. Other systems use different thresholds, so menopause alone does not trigger an immediate scan.

What happens during a DXA scan?

DXA is painless, takes about ten minutes and uses a very low dose of X-rays. You lie clothed on an open table while the hip and spine are scanned. Metal in the measurement area should be removed. Tell the centre if pregnancy is possible or if you recently had a contrast examination. A heel ultrasound or body-composition scan is not equivalent to central DXA of the hip and spine.

What does the result mean?

In postmenopausal women, reports usually use a T-score. A score of minus 1 or higher is described as normal. Between minus 1 and minus 2.5 indicates low bone mass, often called osteopenia. Minus 2.5 or lower meets the bone-density definition of osteoporosis. Before menopause, an age-matched Z-score is often more appropriate. Ask which reference applies to you.

A T-score is not a treatment plan. Fractures occur above minus 2.5, while arthritis can make a spinal result look high. Scan quality, fractures, falls, blood tests and overall health must be interpreted together.

What can you do now?

  • Gather your history: fractures, falls, age at menopause, family history, health conditions and every medicine you take.
  • Ask your GP or menopause clinician for a fracture-risk assessment. A tool such as FRAX can support, but not replace, clinical judgement.
  • If DXA is advised, ask where it will be done, how to prepare, whether it is funded and how the result may change care.
  • Do not wait for a scan to move: combine resistance training, weight-bearing activity and balance work at a safe level for you.

What helps over time?

Aim for enough calcium from food, adequate protein and appropriate vitamin D. Supplements depend on diet, blood results, kidney health and medicines. Stopping smoking, limiting alcohol and reducing falls add protection. If risk is high, bone medicines or, in selected circumstances, hormone therapy may be options after individual discussion.

Repeat scans also need a reason. Very short intervals may show measurement variation rather than a real change. Timing should reflect the first result, new risks and treatment, ideally using the same machine.

When should you seek prompt medical help?

Arrange assessment after a fracture from minimal trauma, new severe back pain, clear loss of height or increasing spinal curvature. After a fall, severe hip or groin pain, a shortened leg or being unable to stand or bear weight needs urgent help. A previous fragility fracture is a major risk signal even before a DXA scan.

What does the research say?

A 2025 systematic evidence review for the US Preventive Services Task Force found moderate net benefit from screening women aged 65 or over and younger postmenopausal women at increased risk. Harms from screening itself were judged small. The pathway matters: an abnormal result needs appropriate evaluation, counselling and evidence-based management.

This evidence does not support scanning everyone as menopause begins. Trials largely involved older women and risk tools are imperfect. SWAN linked earlier menopause with lower later bone density and more fractures, but observational data cannot prove that immediate DXA for everyone prevents fractures.

Further reading and scientific sources

Your step for this week

Take action: Create a one-page bone checklist covering fractures, falls, age at menopause, family history, health conditions and medicines. This week, request a risk review if any factor applies or you are unsure.

Looking after your bones starts with a clear risk assessment, not fear of a number, followed by one realistic next step.

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