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Q.

How are DEXA bone scan scores interpreted?

Related Topics: Bone Density Test
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A.

DEXA scores are reported as "T-scores" and "Z-scores."


  • The T-score is a comparison of a person's bone density with that of a healthy 30-year-old of the same sex.

  • The Z-score is a comparison of a person's bone density with that of an average person of the same age and sex.


Lower scores (more negative) mean lower bone density:

  • A T-score of -2.5 or lower qualifies as osteoporosis.

  • A T-score of -1.0 to -2.5 signifies osteopenia, meaning below-normal bone density without full osteoporosis.


Multiplying the T-score by 10% gives a rough estimate of how much bone density has been lost.

Z-scores are not used to formally diagnose osteoporosis. Low Z-scores can sometimes be a clue to look for a cause of osteoporosis.

This answer should not be considered medical advice...down arrowThis answer should not be considered medical advice and should not take the place of a doctor’s visit. Please see the bottom of the page for more information or visit our Terms and Conditions.up arrow

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Read the Original Article: Bone Scans and Bone Health Screenings