Hi, Thanks for writing in. An abnormal DEXA scan may suggest weakness of the bones in your skeleton leading to osteoporosis which increases the risk of fractures. In this scan, the bone density is calculated by dual energy X ray absorptiometry. The mineral content of bones is tested and the result appears as a score with respect to a normal female at your age, Z score and a normal 30 years old adult female, the T score. 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.