Korean Journal of Pediatrics 2007;50(7):629-635.
Published online July 15, 2007.
The novel expression method of pediatric body composition : fat mass index and fat-free mass index
Young Gyu Cho1, Jae Heon Kang1, Hye Ryoung Song1, Kyung A Kim2, Ji Hyun Song3, Myeong Ho Jung3
1Department of Family Medicine, College of Medicine, Inje University, Seoul Paik Hospital, Seoul, Korea
2Obesity Research Institute of Inje University, Seoul, Korea
3Division of Metabolic Diseases, Center for Biomedical Sciences National Institute of Health, Seoul, Korea
소아 체성분의 새로운 표현법: 체지방량지수(fat mass index)와 제지방량지수(fat-free mass index)
조영규1, 강재헌1, 송혜령1, 김경아2, 송지현3, 정명호3
1인제대학교 서울백병원 가정의학과
2인제대학교 다이어트 연구소
3국립보건연구원 생명의과학센터 대사영양질환팀
Correspondence: 
Jae Heon Kang, Email: fmleader@nuri.net
Abstract
Purpose
: This study was conducted to assess the usefulness of fat-free mass index (FFMI) and fat mass index (FMI) as novel expression methods of body composition in children.
Methods
: A total of 466 Second grade students-248 boys and 218 girls- from all elementary schools the Gwacheon City underwent anthropometric measures including bioelectrical impedance analysis (BIA) and biochemical tests. The correlation coefficients between obesity indices, including FMI and FFMI, and metabolic risk factors, were assessed. Metabolic risk factors of children with increased FMI were compared with those of children with normal FMI. We compared FMI and FFMI percentile distribution between this study's subjects and the subjects of the Fukuoka body composition study.
Results
: FMI was lower and FFMI was higher in this study's subjects compared to the subjects of the Fukuoka body composition study. FMI was correlated with other obesity indices and several metabolic risk factors. Metabolic risk was higher in children with increased FMI than in children with normal FMI.
Conclusion
: FMI and FFMI were useful indicators in comparing difference of body composition among children that had different body size and growth. High FMI was related to increase of metabolic risk in children.
Key Words: Body composition, Body mass index, Obesity, Child


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