BONE DENSITOMETRY RESULT Bone mineral density test (lumbar vertebrae). This methods measures the subject's bone mineral density (BMD), and can detect osteopenia (a decrease in bone density) and osteoporosis (pathological reduction in bone density). The chart indicates the patient's BMD (in g/cm2) for their age. Here, a BMD of 1.05 g/cm2 corresponds to a normal BMD for a person of this patient's age. The T-score and Z-score indicate the variation between the subject's BMD and an average value which, for the T-score corresponds to that of a population comprising members of the same sex and age group (20-30 year-olds, the age group in which bone density is at its peak), and for the Z-score, that of a population of the same sex and age. A T-score of between 0 and -1 indicates a normal BMD, between -1 and -2.5 indicates osteopenia, and below -2.5 indicates osteoporosis. Here, a T-score of -0.15 corresponds to a normal BMD, and a Z-score of 0.75 means that the person's bone density is above the average score for individuals of their age. Results can also be expressed as a percentage.
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