Influence of gestational weight gain and preconception body mass index on overweight and obesity of school-age children
Objective To understand the prevalence of overweight/obesity among school-age children in Pudong New Area of Shanghai,and to explore the influence of gestational weight gain and pre-pregnancy body mass index(BMI)on weight status of school-age children.Methods From November to December 2020,a stratified cluster sampling method was adopted to select first-grade students from 13 primary schools in Pudong New Area of Shanghai.After matching with the birth monitoring database,755 students with complete birth information were selected as the study subjects.The relevant information of mothers before and during pregnancy was retrospectively collected,and the effects of pregnancy weight gain combined with pre-pregnancy BMI on overweight/obesity in school-age children were analyzed.Results 1)The prevalence rates of overweight and obesity of first-grade children were 15.89％and 18.41％,respectively.2)Maternal excessive weight gain during pregnancy(OR=1.678)and overweight/obesity before pregnancy(OR=2.315,2.412)were risk factors for overweight/obesity of the offspring at school age(P＜0.05).3)For mothers who were underweight before pregnancy,excessive weight gain during pregnancy was associated with overweight/obesity in school-age children in their offspring(OR=7.436,95％CI:1.489-37.143,P＜0.05).4)Excessive weight gain during pregnancy combined with overweight/obesity before pregnancy significantly increased the risk of overweight/obesity in offspring(OR=3.606,95％CI:2.030-6.405,P＜0.05).Mothers who gained a moderate amount of weight during pregnancy and were emaciated before pregnancy had a significantly lower risk of overweight/obesity in their school-age children(OR=0.217,95％CI:0.049-0.967,P＜0.05).Conclusion Excessive weight gain during pregnancy increases the risk of overweight/obesity in school-age children in their offspring,strengthening pregnancy health education and perinatal care to help pregnant women maintain appropriate weight gain during pregnancy may be an important and novel strategy to prevent childhood obesity.
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