[Relationship between body mass index and fat mass percentage in children aged 3-17 years in China].

Zhonghua Liu Xing Bing Xue Za Zhi

National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention/Key Laboratory of Public Nutrition and Health, National Health Commission of the People's Republic of China/Key Laboratory of Human Milk Science, Chinese Center for Disease Control and Prevention, Beijing100050, China.

Published: November 2024

To analyze the relationship between body mass index (BMI) and fat mass percentage (FMP) in children aged 3-17 years in China. 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- 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- score/BMI and FMP in classifying the subjects was measured using Kappa coefficient. The FMP of malnutrition, normal and overweight/obesity in boys was higher in age group 10-13-year than in other age groups (all <0.001). The FMP of all nutritional status in girls increased with age (all <0.05). The BMI of boys in all the FMP levels increased with age (all <0.05). When the FMP of girls was 25%- or ≥30%, BMI increased with age (all <0.001). The relationship between BMI and FMP was strong (=0.705, <0.001), with of 0.618 in boys and 0.884 in girls. The consistency between BMI- score/BMI and FMP in classifying the subjects was found to be moderate (Kappa=0.574, <0.001). There was a strong relationship between BMI and FMP. The consistency between BMI- score/BMI and FMP in classifying the subjects was moderate.

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http://dx.doi.org/10.3760/cma.j.cn112338-20240514-00271DOI Listing

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