<P> For those people who do have bone density tests, two conditions which may be detected are osteoporosis and osteopenia . The usual response to either of these indications is consultation with a physician . </P> <P> Results are often reported in 3 terms: </P> <Ol> <Li> Measured areal density in g cm </Li> <Li> Z - score, the number of standard deviations above or below the mean for the patient's age, sex and ethnicity </Li> <Li> T - score, the number of standard deviations above or below the mean for a healthy 30 - year - old adult of the same sex and ethnicity as the patient </Li> </Ol> <Li> Measured areal density in g cm </Li>

What does t score mean on bone density