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웨어러블 신체구성 측정기기(InBody BAND)의 타당도 및신뢰도 검증

Validity and reliability of the wearable body composition measurement tool(InBody BAND)

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초록

이 연구의 목적은 최근 시판되고 있는 웨어러블 신체구성 측정기기인 InBody BAND의 타당도와 신뢰도를 검증하고자 한다. 이 목적을 달성하기 위해 DEXA와 InBody720에서 산출된 신체구성 변인(LBM, FBM, %BF)들의 측정값을 이용하여 InBody BAND의 타당도를 검증하였으며, InBody BAND를 3회 반복 측정한 신체구성 변인들의 측정값을 이용하여 신뢰도를 검증하였다. 연구대상은 경기도 소재 Y대학교에 재학 중인 대학생(남: 45, 여: 30)75명을편의표본추출방법으로 선정하였으며, 준거타당도를 알아보기 위해 DEXA, InBody 720, InBody BAND에서 산출된측정값으로 상관분석(pearson's correlation), 선형회귀분석(linear regre -ssion analysis)을 실시하여 상관도를 구하고회귀식의 기울기와 절편의 차이를 살펴보았다. 그리고 기기의 신뢰도를 알아보기 위해 3회 반복 측정한 InBody BAND 측정값에 대한 일관성을 알아보는 방법으로 급내상관계수(inter-class correlation coefficient; ICC) 분석을 실시하였다. 분석 결과, 남성과 여성에서 모두 준거타당도, 측정기기의 재검사 신뢰도가 높게 나타났다. 하지만 InBody BAND는 남성의 체지방을 타 기기보다 과대추정하고 있는 것으로 나타났으며, 여성의 체지방을 타 기기보다 과소추정하고 있는 것으로 나타났다. Inbody BAND는 결과적으로 통계적으로 유의한 수준의 타당도와 신뢰도를 확보하여신체구성 변인들을 비교적 정확하게 측정할 수 있으며 객관적인 자료로 활용할 수 있지만 적용되는 추정식의 과대·과소 추정 여부를 재검토할 필요가 있다고 사료된다.

Abstract

The purpose of this study is to test the validity and reliability of measuring body composition(Fat Body Mass; FBM, Lean Body Mass; LBM, Percent Body Fat; %BF)in recent years due to the development of wearable devices InBody BAND. For this purpose, the validity verification of the measuring device in accordance with DEXA and Inbody720 known method, and to test the reliability of the measuring device in a repeated measures Inbody BAND. For this study, subjects Gyeonggi material Y university student being college students (male: 45, female: 30) 75 people a convenience sampling method were selected by, reference validity and convergent validity of the Learn to DEXA, InBody 720, InBody BAND in calculating the FBM, LBM, %BF measurement of the correlation analysis (pearson's correlation), linear regression analysis (linear regression analysis) conducted a correlation to obtain a slope and intercept of the regression equation looked at the difference. And inter-class correlation coefficient(ICC) to find out the consistency of repeated measurements Inbody BAND FBM, LBM, %BF measurements three times to determine the reliability of the device. The results, when applied to target both men appeared highly convergent validity and criterion validity, reliability of test equipment confirmed the usefulness of the device. As a result, Inbody BAND has a statistically significant level of validity and reliability. Thus, the body composition variables can be measured relatively accurately and used as objective data. However, it is necessary to review whether overestimation or underestimation of the applied estimation formula.

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