An analysis of DXA-measured bone mineral density in 2 805 healthy women in Chongqing，China

Abstract:

Objective：To establish a preliminary bone mineral density（BMD） database and the peak BMD of people from different age groups in Chongqing，China，through the measurement of BMD in 2 805 healthy women in Chongqing，and to investigate the effect of age and body mass index on BMD. Methods：Dual-energy X-ray absorptiometry（DXA） was used to determine the BMD of the lumbar vertebrae（L1-4） and the femoral neck of healthy women who had physical examinations in Chongqing Health Center for Women and Children from June 2011 to November 2015. Results：The prevalence rate of osteoporosis in 2 805 healthy women was 11.44%，and it increased with age（ χ2=403.800，P=0.000）. The prevalence rate of osteoporosis in women over 50 years of age was 26.04%；there were significant differences in the proportions of women with normal bone mass and osteoporosis before and after the age of 50 years（P=0.000）. The peak BMD（1.116±0.120） g/cm2 of lumbar vertebrae was reached at the age of 35 to 39 years，and the peak BMD（0.935±0.146） g/cm2 of femoral neck was reached at the age of 17 to 19 years. Conclusion：In this study，a DXA-measured BMD database of lumbar vertebrae and femoral neck of people in Chongqing was established.