关键词: 人体成分, 多频生物电阻抗技术, 营养状态, 脂肪重聚, 儿童

Abstract: Objective To analyze the differences in body composition of children with different genders,age and nutritional status,so as to provide basis for children's health evaluation. Methods A total of 1 185 children aged 3 to 8 years who took physical examination in Shenzhen Maternal ＆ Child Healthcare Hospital from January to December 2019 were enrolled in this study. All participants were measured for height and weight,and multi-frequency bioelectrical impedance analysis (MF-BIA) was used to measure body composition indicators. The correlations among gender,age and nutritional status with children's body composition were analyzed. Results The weight,body mass index(BMI),fat-free mass(FFM),total body water(TBW) and basal metabolic rate(BMR) of boys were higher than those of girls,while PBF was lower in girls (t=2.94,5.05,5.21,4.67,2.88,5.27,P<0.05). The height and body fat (BF) changed little between different boys and girls,and the difference was not statistically significant (P>0.05). BF,FFM of boys and girls all increased with age,while BMI decreased with age firstly but turned to an increasing trend from 6—years old (P<0.05). The age of adiposity rebound (AR) in children was about 5 years old. BF,PBF and FFM of boys and girls all gradually increased with the increasing of BMI (boys:F=33.28、29.81、33.02;girls:F=28.57、13.38、24.55,P<0.05). There was a high consistency between PBF and BMI in the evaluation of overweight and obesity in children (χ²=143.28、99.02,P<0.05),but the detection rate of overweight and obesity in PBF was higher (P<0.05). Conclusions There are obvious differences in body composition among children with different genders,age and nutritional status. Body composition has a good early warning effect on the occurrence of overweight and obesity in children,and is a beneficial supplement to the health evaluation of children.

Key words: body composition, multi-frequency bioelectrical impedance analysis, nutritional status, adiposity rebound, children