| Objective To investigate the changing pattern of bone mineral density (BMD) in the elderly men in Jinan, in order to provide basis for the prevention and treatment of osteoporosis. Methods Three communities under the adminstration of Qianfoshan Hospital were randomly selected in 2010. Then 963 healthy men were randomly selected in these 3 communities, from 40 to 90 years old, with an average age of 61.3±13.6 years old. BMD of the lumbar vertebrae (L1-4), the femoral neck, the total femur, the radius distal, and the total radius and the ulna was detected using dual-energy X-ray absorptiometry (DEXA, Lunar DPX-NT, GE, USA). Results When above 40 years old, BMD of the lumbar vertebrae, the femur, and the radius and the ulna decreased gradually. While at the age of 70-74 years old, BMD of the femoral neck and the radius distal decreased rapidly. The cumulative loss rate of BMD of the femoral neck, the total femur, the radius distal, and the total radius and the ulna was 18.71%, 14.80%, 20.95%, and 25.68%, respectively. The incidence of osteoporosis and bone mass loss in subjects between 70 and 79 years old was 29.1% and 45.3%, respectively. The rate in subjects between 80 and 89 years was 50.0% and 32.4%, respectively. Conclusion Bone mass loss is accelerated in men between 70 and 74 years old. The incidence of osteoporosis increased significantly in men over 70 years old. |