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Korean J Fam Med > Volume 30(11); 2009 > Article
Korean Journal of Family Medicine 2009;30(11):887-894.
DOI: https://doi.org/10.4082/kjfm.2009.30.11.887    Published online November 20, 2009.
Cutoff of Percent Body Fat to Predict Obesity and Metabolic Risk in Children and Adolescents: 2007 Children and Adolescent Physical Growth Standard.
Young Sok Kang, Jee Hyun Kang, Moon Chul Kim, Byung Yeon Yu, Eun Ju Sung, Seon Yeong Lee, Yeon Jung Lee
1Department of Family Medicine, Konyang University Hospital, Konyang University College of Medicine, Daejeon, Korea. jeehyunkang@yahoo.co.kr
2Department of Family Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
3Department of Family Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
4Department of Family Medicine, Bundang CHA Hospital, CHA University College of Medicine, Bundang, Korea.
소아 비만과 관련된 대사 이상을 예측하기 위한 체지방률의 절단값: 2007년 소아 청소년 신체발육 표준치를 기준으로
강영석, 강지현, 김문철, 유병연, 성은주, 이선영, 이연정
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Abstract
Backgroud: Body mass index (BMI) for gender and age and percentage-weight-for-height (PWH) for gender and height have been frequently used to diagnose childhood obesity. However, few studies have examined the optimal cutoff of percent body fat (%BF) to predict metabolic abnormalities in obese children. Methods: One thousand fi fteen obese children aged 10 to 15 years were enrolled in this study. The %BF cutoff values were calculated by ROC analysis for metabolic abnormalities. We also calculated %BF cutoff values corresponding to a BMI of > 85th or 95th percentile for gender and age and a PWH of > 120% for gender and height based on the 2007 Korean children and adolescents growth standard chart. To defi ne metabolic abnormalities in children, we used the criteria of metabolic syndrome recommended by International Diabetes Federation consensus for children and adolescents. Results: The %BF cutoff corresponding to the group having more than one metabolic abnormality in this study population were 38.4% (sensitivity 40.1%, specifi city 84.4%) in total, 38.4% (sensitivity 35.4%, specifi city 84.8%) in boys and 39.5% (sensitivity 38.9%, specifi city 90.9%) in girls. The %BF cutoff values corresponding to a BMI ≥ 95 percentile were 38.1% (sensitivity 50.5%, specifi city 72.7%), a BMI ≥ 85 percentile were 34.5% (sensitivity 69.3%, specifi city 74.2%), and a PWH ≥ 120% were 36.4% (sensitivity 72.3%, specifi city 64.4%) in total. Conclusion: The optimal cutoff value of percent body fat to predict metabolic abnormalities in obese children may be 38.4% (boys 38.4, girls 39.5%) and we suggest 34.5% as a cutoff value of %BF for screening childhood obesity.
Key Words: Childhood Obesity; Metabolic Abnormalities; Percent Body Fat; Cutoff
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