Wang Xiaolei, Wang Huijun, Su Chang
Daxing District Management Center for Community Health Service, Beijing 102600, China.
Wei Sheng Yan Jiu. 2016 Nov;45(6):888-896.
To explore the impacts of different urbanization levels on BMI and overweight/obesity among children and adolescents.
The samples were collected by the cluster random sampling method from the China Health and Nutrition Survey which included children and adolescents between 1997 and 2011. Multilevel mixed-effect regression analysis was used to investigate the impacts of differenturbanization levels, which were divided into low, middle and high based on an urbanization index, on overweight/obesity among children and adolescents.
In the multilevel mixed-effect linear regression analysis, after controlled age, total energy intake, the percentage of energy from fat, physical activity, sedentary time, family income, educational levels and overweight/obesity of parents, the BMI values of boys who lived in the high urbanization level community were higher than those who lived in the low urbanization level community( 95% CI 0. 03-1. 19, P < 0. 05). There was no association of urbanization with BMI values in the girls. In the multilevel mixed-effect Logistic regression analysis, after controlled age, BMI baseline, total energy intake, the percentage of energy from fat, physical activity, sedentary time, family income, educational levels and overweight/obesity of parents, there were no association of urbanization with the prevalence of overweight/obesity in both boys and girls( boys P =0. 17, girls P = 0. 57).
The BMI values of boys who lived in the high urbanization level community are higher than those who lived in the low urbanization level community. There is no association of urbanization with BMI values in the girls and with the prevalence of overweight/obesity in both boys and girls. It is probably because community urbanization do not directly but indirectly affect children 's overweight and obesity through changing life style and family factors of children and adolescents.
探讨不同城市化水平对儿童青少年体重指数（BMI）及超重/肥胖的影响。
采用整群随机抽样方法，从1997年至2011年的中国健康与营养调查中选取儿童青少年样本。基于城市化指数将城市化水平分为低、中、高三个等级，采用多水平混合效应回归分析研究不同城市化水平对儿童青少年超重/肥胖的影响。
在多水平混合效应线性回归分析中，在控制了年龄、总能量摄入、脂肪供能比例、身体活动、久坐时间、家庭收入、教育水平及父母超重/肥胖情况后，生活在高城市化水平社区的男孩BMI值高于生活在低城市化水平社区的男孩（95%可信区间0.03 - 1.19，P < 0.05）。女孩的BMI值与城市化水平无关联。在多水平混合效应Logistic回归分析中，在控制了年龄、BMI基线、总能量摄入、脂肪供能比例、身体活动、久坐时间、家庭收入、教育水平及父母超重/肥胖情况后，男孩和女孩的超重/肥胖患病率与城市化水平均无关联（男孩P = 0.17，女孩P = 0.57）。
生活在高城市化水平社区的男孩BMI值高于生活在低城市化水平社区的男孩。女孩的BMI值及男孩和女孩的超重/肥胖患病率与城市化水平均无关联。这可能是因为社区城市化并非直接而是通过改变儿童青少年的生活方式和家庭因素间接影响儿童超重和肥胖。
