Relationship between body mass index and fat mass percentage in children aged 3-17 years in China
Objective To analyze the relationship between body mass index(BMI)and fat mass percentage(FMP)in children aged 3-17 years in China.Methods The BMI and FMP data of children aged 3-17 years from the National Nutrition and Health Systematic Survey in 0-18 years old children in China was analyzed.BMI-Z score/BMI and FMP were used to classify the subjects,respectively.Spearman correlation was used to analyze the correlation between BMI and FMP.The consistency between BMI-Z score/BMI and FMP in classifying the subjects was measured using Kappa coefficient.Results The FMP of malnutrition,normal and overweight/obesity in boys was higher in age group 10-13-year than in other age groups(all P＜0.001).The FMP of all nutritional status in girls increased with age(all P＜0.05).The BMI of boys in all the FMP levels increased with age(all P＜0.05).When the FMP of girls was 25％-or ≥30％,BMI increased with age(all P＜0.001).The relationship between BMI and FMP was strong(r=0.705,P＜0.001),with r of 0.618 in boys and 0.884 in girls.The consistency between BMI-Z score/BMI and FMP in classifying the subjects was found to be moderate(Kappa=0.574,P＜0.001).Conclusions There was a strong relationship between BMI and FMP.The consistency between BMI-Z score/BMI and FMP in classifying the subjects was moderate.
万方数据
维普
