Question :

Bone densitometry: how to interpret the results?

Dear Ask The Doctor:
I've had a DEXA test of the lumbar spine demonstrated of 0.957 grams per cent. squared z-score 0.957and I need to know what my scores mean , also T-S of -0.7 . I am 44 yrs old , white female , in mentapause


Answer :

Dear Patient: 
Dual-energy X-ray absorptiometry (DXA) is currently the referred technique for assessing bone mineral density. Bone Mineral Density results are reported as T-scores and Z-scores. T-scores are the number of standard deviations below the mean BMD A T-score of 0 means that the patient has a BMD value equal to the mean for young adults. A T-score of -2.5 means that the patient has a BMD value that is 2.5 standard deviations below the mean. A Z-score is the number of standard deviations below or above the mean BMD value .

: T -score > -1.0 (below the young adult reference range)
: T-score -1.0 to -2.5
T-Score < -2.5


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