Characterization of bone mineral density in Beijing urban residents in different age groups:analysis of 3285 cases of bone mineral density results

Objective To investigate the pattern of bone mineral density(BMD) and the incidence of osteoporosis in Beijing urban residents.Methods BMD values of the lumber spine 2-4 and the proximal femur were determined using dual-energy X-ray absorptiometry(Medilink,France) in 3285 residents aged from 20 to 89 years old.Results The peak BMD values of the proximal femur and the lumbar vertebra appeared in the 20-29 age groups in both males and females.BMD then declined gradually thereafter along with age growth.BMD in females showed a sharp decline in the 50-59 age group.The phenomenon did not appear in males.The incidence of osteoporosis was 23.19% in males and 28.7% in females after 40 years old,respectively.Conclusion This study provides an objective and effective evidence for prevention,diagnosis,and treatment of osteoporosis,by exploring the BMD pattern and osteoporosis incidence in Chinese population in Beijing urban region.