不同性别、年龄及营养状态儿童的人体成分分析

目的 探讨不同性别、年龄及营养状态儿童体成分的差异,为儿童健康评价提供线索。方法 选取2019年1—12月在深圳市妇幼保健院儿童健康科体检的儿童1 185例,年龄3~8岁。所有研究对象均进行身高、体重测量;应用多频生物电阻抗分析仪测量人体成分各指标;分析不同性别、年龄、营养状态与儿童体成分之间的关系。结果 男童的体重、BMI、去脂体重、身体水分及基础代谢率均高于女童,体脂率低于女童(t=2.94、5.05、5.21、4.67、2.88、5.27,P＜0.05);而身高和体脂含量在不同性别组间变化小,差异无统计学意义(P＞0.05)。男、女童的体脂含量、去脂体重均随年龄增长而增加,而BMI随年龄增加呈现先降低后(至6~岁)增加的趋势(P＜0.05),按BMI变化趋势,儿童脂肪重聚年龄约5岁。男、女童体脂含量、体脂百分比、去脂体重、均随BMI增加而逐渐递增(男:F=33.28、29.81、33.02,女:F=28.57、13.38、24.55,P＜0.05)。PBF与BMI评价儿童超重和肥胖有较高的一致性(χ²=143.28、99.02,P＜0.05),但PBF的超重及肥胖检出率更高(P＜0.05)。结论 不同性别、年龄及营养状态儿童的人体成分存在明显差异,体成分对于儿童超重和肥胖的发生有较好的预警作用,是对儿童健康评价的有益补充。

Analysis of body composition of children with different genders,ages and nutritional status

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.