OBJECTIVE: To determine the correlation between osteoporosis and the related factors through retrospective study. METHOD: Data from 1002 patients (834 women and 168 men) were analyzed through medical records [bone mineral density (BMD), age, height (Ht), body weight (BW), body mass index (BMI), and the accompanying conditions]. BMD of lumbar spine (L1-4) and femur (neck, Ward's triangle, trochanter, and shaft) were measured using dual energy x-ray absorptiometry (DEXA) and were correlated with age, Ht, BW, BMI, and accompanying diseases, and fracture incidence. RESULTS: 1) BMD of lumbar spine and femur neck in women significantly correlated with age and that of lumbar spine in men significantly correlated with BMI, Ht, BW. 2) The accompanying conditions in osteoporosis were diabetes mellitus (5.9%), Cushing syndrome (3.7%), oophorectomy (2.8%), hyperthyroidism (2.6%), and chronic renal failure (1.0%). 3) Fracture sites and their incidences were single spine (4.89%), multiple spine (2.99%), and femur (2.0%). 4) Mean BMD and T-score in fracture group was 0.687+/-0.16 g/cm2, 3.51+/-1.3 in lumbar spine and 0.578+/-0.14 g/cm2, 2.70+/-1.1 in femur, respectively. CONCLUSION: Osteoporosis is a major public health problem among the elderly, demanding effective strategic approach for prevention and treatment. We concluded that further studies of male osteoporosis are required.