여학생의 신체구성평가지표로서 체지방량지수와 제지방량지수
Reference norms of fat mass index and fat-free mass index for girls
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초록
제지방량 및 체지방량을 체중의 비율로서 나타내는 것은 바람직하지 않다. 본 연구의 목적은 초, 중등학교의 건강한 여학생의 제지방량지수(제지방량/신장x신장) 및 체지방량지수(체지방량/신장x신장)의 참조규준을 정하고, 7-15세 사이의 3연령그룹(7-9, 10-12, 13-15세) 사이에 어느 정도 차이를 있는지, 그리고 제지방량지수 및 체지방량지수의 백분위수를 개발하는 것이었다. 신장, 체중, 그리고 신체구성이 크게 다른 1222명의 여학생을 대상으로 체지방량과 제지방량을 구하기 위하여 생체전기저항법을 이용하였다. 제지방량지수의 참조규준(25-75 백분위율)은 8.1～11.5였고, 이 값은 연령대 사이에서 유의한 차이를 보였다. 신체질량지수가 18.7% 증가한 것에 비하여 체지방량지수는 13.7% 증가하여 다른 양상을 보였다. 제지방량지수 및 체지방량지수는 다양한 목적으로 사용되며, 같은 단위로 신체구성을 표현하는 이점이 있다. 백분위수로 나타낸 자료는 임상이나 현장에서 성이 다른 초등학생 및 중학생의 신체구성을 비교할 때 참조값으로 사용할 수 있을 것이다. 추후 남녀의 성 비교를 포함한 일반인의 제지방량지수 및 체지방량지수의 규준값을 결장하는 연구가 이루어져야 할 것이다.
Abstract
Expressing fat-free mass (FFM) and body fat mass (FM) as percentages of body weight is unsatisfactory. The aims of this study were to establish reference norms for FFM index [FFM (kg)/height (m)2, or FFMI) and fat mass index [FM (kg)/height (m)2, or FMI] in a large population of healthy girls, to observe differences in these values in three age groups between 7 and 15 years, and to develop percentile distributions for these parameter. One thousand two hundred twenty-two girls with a wide spectrum of stature, body weight, and body composition underwent bioelectrical impedance analysis (BI) for the determination of FFM and FM. The reference norms (25th-75th percentile) for the FFMI (8.1-11.5) was significantly different in 3 age groups (7-9, 10-12, and 13-15 yrs) (p<.001). FMI increased by an average of 13.7% compared to an increase in BMI of 18.7%. FFMI and FMI have the advantage of expressing both aspects of body composition in common units. The data presented as percentiles can serve as reference in comparing a child's body composition to that of healthy children of the same gender. These body composition ranges can be used by clinicians and nutritionists as reference values for girls.
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