Objective To describe the current prevalence of overweight and obesity among infants in Beijing, and to explore the influencing factors of overweight and obesity based on body composition analysis. Methods A multicenter cross-sectional survey was conducted in Haidian district, Changping district, Shijingshan district and Tongzhou district of Beijing from January to April 2021.Single fetus infants aged 0 to 2 years and without obvious malformations and genetic metabolic diseases were selected, and completed questionnaire survey (infant general demographic characteristics, maternal pregnancy and delivery, infant birth, etc.) and physical examination (infant length, weight and body composition measurement).Finally 896 infants with complete data of questionnaire survey and physical examination were enrolled in this study. Results The prevalence of overweight/obesity diagnosed by weight for height Z score (WHZ) in four districts of Beijing was 9.65% in boys and 4.42% in girls, whereas the prevalence of overweight/obesity diagnosed by body composition analysis was as high as 21.46% and 7.67% in boys and girls, respectively.Fat mass index (FMI) was significantly higher in infants whose mothers were overweight and obese before pregnancy (boys: β=0.222, 95%CI: 0.021 - 0.423; girls: β=0.237, 95% CI: 0.048-0.426) and infants who had larger for gestational age (boys:β=0.212, 95% CI: 0.014 - 0.411) and larger birth length (boys: β=0.037, 95%CI: 0.012 - 0.063; girls: β=0.027, 95% CI: 0.001 - 0.054,P<0.05). Conclusions The prevalence of overweight and obesity in infants in the four districts of Beijing is not optimistic, and the measurements of body composition can reduce the rates of missed diagnosis and inaccurate diagnosis of infant obesity.Therefore, effective intervention measurement should be taken to prevent and control overweight and obesity in the early stage of life.
Key words
overweight /
obesity /
body composition /
infants
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