PURPOSE: To analogize the result of the test through explaining the correlation of bone mineral density (BMD) test value between proximal femur and lumbar spine. MATERIALS AND METHODS: It is based on 59 cases who visited the out-patient department. They were classified into two groups by age, group I (55~59 yr) and II (60~64 yr). Then we evaluated the average and the degree of correlation between the two groups and analyzed the correlation of the two sites according to the T & Z-score through the regression analysis. RESULTS: In T-score, the correlation between L (independent variable, lumbar) and H (dependent variable, femur) indicated that L = 0.751 xH -0.195 for group I and L = 0.912 xH+0.31 for group II. In Z-score, the correlation was L = 0.647 xH -0.656 for group I and L = 0.897 xH -0.481 for group II. CONCLUSION: It is regarded that there will be a clinical availability which can analogize the result of a part by using the result of the other part.