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Objective@#To examine the association of pre-pregnancy body mass and weight gain during pregnancy with macrosomia. @*Methods@#From January 2015 to December 2015, a total of 20 477 pregnant women were recruited by probabilistic proportional scale sampling with simple randomization in Sichuan, Yunnan and Guizhou Provinces. Basic information of pregnant women, weight gain during pregnancy and weight of newborn were collected. A multiple logistic regression model was used to assess the association between the pre-pregnancy body mass and gestational weight gain indicators with macrosomia. @*Results@#20 321 mother-infant were included in the final analysis. 20 321 pregnant women were (30.09±4.10) years old and delivered at (39.20±1.29) weeks, among which 12 341 (60.73%) cases were cesarean delivery. The birth weight of 20 321 infants were (3 292.26±431.67) grams, and 970 (4.77%) were macrosomia. The multiple logistic regression model showed that after adjusting for the age of women, compared to the normal weight group in the pre-pregnancy, the overweight and obesity group elevated the risk of macrosomia, with OR (95%CI) about 1.99 (95%CI: 1.69−2.35) and 4.05 (95%CI: 3.05−5.39), respectively. After adjusting for the age, the pre-pregnancy BMI, delivery weeks, delivery mode and infant′s gender, compared to the weight-gain appropriate group, higher weight gain rate in the mid-pregnancy and excessive total gestational weight gain elevated the risk of macrosomia, with OR (95%CI) about 1.99 (95%CI: 1.66−2.39) and 1.80 (95%CI: 1.55−2.08), respectively. @*Conclusion@#The overweight before pregnancy, obesity before pregnancy, the rate of weight gain in the second trimester and the high total weight gain during pregnancy could increase the risk of macrosomia.
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Objective To explore the situation of sedentary behavior and how it correlated to overweight/obesity among children and adolescents in Chengdu,China.Methods A total of 2 211 children and adolescents aged 7-15 years old were recruited in Chengdu city by using the cluster random sampling method.This was a cross-sectional study which aimed to collect data on anthropometry including height and weight and information on basic characters and sedentary behavior by using a self-designed questionnaire.Results According to IOTF criteria,the reporting rate of factor as ‘watching TV ≥2 hours per day on weekend’ showed statistically significant differences among normal,overweight and obese groups (34.80％,4.21％ and 1.92％ respectively,P=0.016 0) in boys.The reporting rates of ‘doing homework ≥2 hours per day’ were 12.17％,0.89％ and 0.49％ respectively (P=0.036 0) and statistically different among the three groups,in girls.Similar results were obtained in boys based on the WGOC criteria.However,there was no statistical difference seen on sedentary behaviors among the three groups in girls according to WGOC criteria.After stratified by age groups,rates on ‘ watching TV on weekend’ were statistically different among normal,overweight and obese group in 13-15 age group in girls (P=0.035 1).Physical activity level (PAL) was positively associated with WHR among both boys and girls when grouped according to PAL (Schofield).However,it was positively associated with WHR only seen in boys according to Chinese Nutrition Society (CNS) criteria.Conclusion The reporting rates of sedentary behavior in obese children were higher than that in overweight/normal ones.However,the correlation of sedentary behaviors on overweight/obesity called for further studies.
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Objective To develop Chinese Children Dietary Index,the overall diet quality of children and adolescents; the association between overall diet quality and overweight/obesity among children in Chengdu.Methods Chinese Children Dietary Index was formulated based on the current Chinese Dietary Guidelines and Food Guide Pagoda for children and adolescents,consisting of 12components.1 997 children and adolescents aged 7-15 years in Chengdu were recruited and their diet quality was evaluated according to Chinese Food Guide Pagoda.Differences in percent body fat (PBF),fat mass index (FMI),fat-free mass index (FFMI) between 3 categories as low,moderate,and high diet quality,were tested.Results The mean Chinese Children Dietary Index score for our population was 59.36 ± 11.50.The diet quality of 13-15 years old adolescents was the worst.7-9years old children with moderate diet quality had highest PBF (P=0.04),while 10-12 years old children with higher diet quality had the lowest FFMI (P=0.002).Conclusion The overall diet quality of children and adolescents in Chengdu could be reflected by Chinese Children Dietary Index.There was association between overall diet quality and overweight/obesity among children and adolescents.However,this association warrants more in depth evaluation in future studies.