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目的了解广东省大学生骨骼生长同发育现状及其与膳食营养摄入和体力活动水平的关系,为维护大学生骨骼正常生长发育提供参考。方法采用双能X线骨密度测量仪,测量广东省212名18～22岁青年全身骨矿物含量(BMC)和骨密度(BMD)。采用问卷调查方法获得研究对象膳食营养摄入及体力活动情况。结果男生全身BMD(1.0 g/cm2)显著高于女生(0.9 g/cm2)(P<0.05),男生全身BMC(2 779.3 g)与女生(2 176.9 g)差异有统计学意义(P<0.05)。女生膳食脂肪、维生素D摄入量与全身BMD、BMC均呈正相关(P值均<0.05),男生钙摄入量与BMD呈正相关,膳食能量、蛋白质、脂肪、维生素D摄入量及体力活动强度与全身BMD、BMC均呈正相关(P值均<0.05)。结论膳食营养素和体力活动可影响广东青年全身骨矿物含量和骨密度。
Objective To understand the status quo of skeletal growth and its relationship with dietary intake and physical activity levels of college students in Guangdong Province and to provide a reference for maintaining the normal growth and development of bone in college students. Methods Bone mineral density (BMC) and bone mineral density (BMD) were measured in 212 youths aged 18-22 years old in Guangdong Province using dual energy X-ray absorptiometry. Questionnaires were used to obtain dietary intake and physical activity of the study subjects. Results The boys’ BMD (1.0 g / cm2) was significantly higher than that of girls (0.9 g / cm2) (P <0.05), and there was a significant difference between male BMC (2 779.3 g) and girls (2 176.9 g) ). Dietary intakes of fat and vitamin D were positively correlated with BMD and BMC in girls (P <0.05). There was a positive correlation between calcium intake and BMD in boys, dietary intake of protein, fat, vitamin D and physical activity Intensity and systemic BMD, BMC were positively correlated (P all <0.05). Conclusion Dietary nutrients and physical activity may affect whole body bone mineral density and bone mineral density in Guangdong youth.