What should you know about DEXA scan readings?

A report commonly includes a bone mineral density measurement and comparison scores. A T-score compares bone density with that of a healthy young adult reference group; a Z-score compares it with people of a similar age and sex. The clinician chooses which comparison is most useful for you. The result is not a diagnosis in isolation and does not measure muscle strength or the pain you feel.

Readings can differ between the hip and spine. Degenerative changes, a vertebral fracture, surgery, or metal hardware may make one area less reliable. When scans are repeated, the team considers machine differences and the amount of change needed to show a real trend. A clinician may combine the report with falls, medicines, and conditions such as Premature Ovarian Insufficiency.

Keep a copy of the report and ask the requesting clinician to translate each score into a plan. Discuss calcium and vitamin D intake, weight-bearing activity, smoking, alcohol, fall prevention, and any medicine that can affect bone. Do not start or stop treatment from a score alone. If a site was excluded, ask whether another measurement or a different test is needed.

Arrange follow-up if the report is unexpectedly low, difficult to interpret, or shows a meaningful change from an earlier scan. Seek prompt care for sudden severe back pain, a suspected fracture, new weakness, or loss of movement. A DEXA reading cannot assess an acute injury, so urgent symptoms should be evaluated separately.

Ask which score applies to you, which body site is most reliable, and whether your result indicates a need for treatment or monitoring. Ask how often reassessment is useful and which lifestyle or medical steps are appropriate for your fracture risk.