ABSTRACT
Objective To find out about the charateristics of bone mineral density(BMD)and its influencing factors among 2079 recruits.Methods Recruits of Armed Police Force in Tianjin were selected as subjects.Their BMD was measured with dual-energy X-ray absorptiometry(DXA).A normal group and low bone mineral density group were selected according to the results of bone mineral density and the methord of 1:1 case-control analysis.Questionnaires were used to investigate their dietary nutrition and lifestyles.One-way ANOVA,chi-square test and Logistic regression analysis were used to explore the influencing factors of BMD.Results In total,2079 military recruits underwent a DXA scan.Normal bone mineral density accounted for 44.78%,and T value was -0.36 ±0.62.Medium bone mineral density made up 50.51%, and T value was -1.57 ±0.38.Low bone mineral density accounted for 4.71%,and T value was -2.82 ±0.39.Single factor analysis suggested that body weight, BMI, movement time, sports venues, spending too much time online all had influences on bone mineral density.Multiariable Logistic regression analysis showed that high animal diet(OR=3.435), spending too much time online(OR=1.246)were the risk factors for bone density.Dairy consumption(OR=0.296)and movement time(OR=0.549)were positively associated with bone mineral density.Conclusion There is a low bone mass in the recruits.We suggest that scientific and standardized management,popularization of knowledge,healthy diet and living habits are necessary to promote good bone peaks.