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Bone density Z-score

Bone and calcium · also printed as Z-score, Z score, DEXA Z-score, DXA Z-score, Bone density Z-score

Typical UK adult range-2.0 SD and above

Above -2.0 is the usual band the scan report prints.

What this test measures

The Z-score compares bone density with the average for someone of the same age and sex, rather than with a young adult. It is the score used in younger people and children.

Why doctors request it

Reported alongside the T-score on every DEXA scan.

What commonly pushes it up

There is no problem with a high value

What commonly pushes it down

Bone density lower than expected for age, which prompts a search for a cause

Everyday reasons for a value outside the range

It is the preferred score under 50 and in children

About the sample

Reported for hip and spine.

Written by a UK consultant physician. Typical UK adult reference ranges; your laboratory's own printed range takes precedence.

Got a report with Bone density Z-score on it?

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This is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.