目的明确早期生活行为因素对学龄儿童骨密度水平的影响。方法选取唐山市3所小学1～6年级的全体学生,经家长知情同意,进行骨健康相关因素调查、体格测量和骨密度测定,完整资料2046人,使用SAS8.2软件包进行统计分析。结果对学龄儿童SOS值有正性影响的早期生活行为因素为婴儿期室外日照、幼儿期至学龄前期的饮奶情况和室外日照,其偏回归系数分别为0.181 6、0.103 5和0.092 6。单因素分析中出生时身高、婴儿期开始添加辅食时间,以及学龄前期的户外游戏活动时间、睡眠时间、佝偻病史、被动吸烟、挑食偏食、蔬菜水果摄入等因素尚未被引入回归方程。结论注重加强儿童早期室外日照机会和饮奶行为的培养,促使骨快速增长期较高骨量的形成。 Objective To clarify the effect of early life behavior factors on bone mineral density in school-age children. Methods All the students in Grade 1 to Grade 6 from 3 primary schools in Tangshan City were enrolled in this study. With the parents’ informed consent, a total of 2046 people were investigated for bone health related factors, physical measurements and bone mineral density. SAS8.2 software package was used for statistical analysis. Results The early life behavioral factors that positively influenced the SOS of school-age children were outdoor sunshine in infancy, drinking milk in early infancy to preschool age and outdoor sunshine. The partial regression coefficients were 0.181 6,0.103 5 and 0.092 6 respectively. Univariate analysis showed that the factors such as height at birth, supplemental feeding time in infancy, preschool outdoor activity time, sleep duration, history of rickets, passive smoking, partial eclipse of eating, fruit and vegetable intake have not been introduced into the regression equation. Conclusions The focus on strengthening the outdoor early childhood outdoor sunshine and drinking behavior training to promote the rapid growth of bone formation of higher bone mass.