Characteristics of Body Composition Estimated by Air-Displacement Plethysmography in Chinese Preschool Children

Frontiers in Public Health

article

Fangfang Chen¹  Jing Wang²  Junting Liu¹  Guimin Huang¹  Dongqing Hou¹  Zijun Liao¹  Ting Zhang¹  Gongshu Liu²  Xianghui Xie¹  Jun Tai¹ 

[1] Department of Epidemiology, Capital Institute of Pediatrics;Research Project Group, Tianjin Women's and Children's Health Center

关键词: body composition;    preschool children;    air displacement plethysmography;    fat mass;    Chinese;   

DOI  :  10.3389/fpubh.2022.926819

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

Objective To describe the characteristics of body composition by air-displacement plethysmography (ADP) among Chinese preschool children. Methods Preschool children were recruited from three kindergartens. Adiposity indices were evaluated using the ADP method. BMI, fat mass index (FMI), fat-free mass index (FFMI) and waist-to-height ratio (WHtR) were calculated. Overweight and obesity were diagnosed using the WHO reference. Analyses were executed by SPSS and MedCalc software. Smoothed curves were constructed using the lambda-mu-sigma (LMS) method. Results This study evaluated the growth trend for body composition of ADP-based body fat indices based on a relatively large sample of preschool children, the first ever reported in China. A total of 1,011 children aged 3–5 years comprised our study population. BMI and FFMI increased with age, but the slope ( P = 0.710) and y intercept ( P = 0.132) in the BMI trend analysis demonstrated no differences between boys and girls. For the FFMI trend lines, the slope was significantly higher for boys than for girls ( P = 0.013). The percentage of fat mass (FM%), FMI, and WHtR were negatively correlated with age for both sexes, except for FMI in girls ( P = 0.094). The 95% CI regression lines for FM% according to different weight statuses intersected. Conclusions ADP is applicable to estimating body composition among Chinese preschool children. Misclassifications might occur when overweight/obese status is defined based on surrogate indices.

【 授权许可】

CC BY