Understanding T-Scores: Bone Density & Osteoporosis Risk

A T-Score is used in relation to calculating bone density. It is the number below or above the standard deviation for the average bone density of a person of the same age, sex and race. Bone density tests use a variety of factors in order to determine a T-Score. A T-Score is used as a predictor for future breaks or the chance of osteoporosis. There are several ways to calculate bone density. There are three main tests that are used: blood test, CAT scan, and DEXA scan.

Things You'll Need

• Calculator
• BMD of person
• BMD of a person of equal age, sex and race

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Instructions

• 1

  Collect the BMD (Bone Mineral Density) results for the person whose T-Score you are calculating. These results can be obtained through X-rays, blood tests, or DEXA scans (dual energy X-ray absorptiometry).

• 2

  Subtract the BMD of the reference BMD from the BMD of the person whose T-Score you are wanting to calculate.

• 3

  Divide the answer you got in Step 2 by the standard deviation for that age/sex/race. This will give you the T-Score for any age, race or sex.