체지방률 검사를 통한 초음파 측정기기의 타당도 검증
Feasibility of Ultrasound Measuring equipment by Body Fat percentage examination
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본 연구는 체지방률 검사를 통한 초음파 측정기기의 타당도 검증에 목적이 있다. 이 목적을 달성하기 위하여 준거방법으로 알려진 이중에너지 방사선 흡수법의 측정값을 이용하여 타당도 검증을 실시하였다. 연구 참여자는 경기도지역 대학생 58명을 대상으로 하였다. 측정은 신장과 체중 그리고 초음파, 이중에너지 방사선 흡수법을 통해서 체지방률을 측정하였다. 자료처리는 SPSS 25.0 program과 MedCalc program을 이용하여 자료의 평균과 표준편차를산출 하였으며, 타당도 검증을 위하여 상관분석(r)과 Bland & Altman Plot을 실시하였다. 또한, 정확성 검증을 위하여 Bland & Altman 결과에 절편과 기울기를 제시하였으며 절대오차율을 제시하였다. 남학생의 경우 초음파 측정기기와 이중에너지 방사선 흡수법 간의 높은 상관관계를(r=.92) 보였고, 여자도 높은 상관관계가 나타냈다(r=.71). Bland & Altman을 이용한 결과 신뢰구간이 안정적으로 나타났으며, 일치성이 높다고 검증 되었다. 남학생의 경우-13.4 ~ 2.9 신뢰구간 범위를 나타냈으며 절대오차율은 28.6%로 나타냈다. 여자의 경우 -8.0 ~ -1.3 신뢰 구간 범위를 나타냈으며 절대오차율은 17.2%로 나타냈다. 결과적으로 초음파 측정기기와 이중에너지 방사선 흡수법 간의 체지방률 타당도는 높은 것을 확인할 수 있었다.
Abstract
The purpose of this study is to verify the validity of ultrasonic measuring device through body fat percentage test. To achieve this goal, validity tests were performed using the measured values of Dual Energy X-ray Absorptiometry known as the reference method. 58 university students were participating in the study from Gyeonggi-do. Height and weight were measured as well as Body fat percentage using the portable ultrasound device and Dual Energy X-ray Absorptiometry. For data processing, the average and standard deviation of the data were calculated by using SPSS 25.0 program and MedCalc program. Correlation analysis (r) and Bland & Altman were performed to examine the validity of the ultrasound device. In addition, the interpolation and slope were presented in the Bland & Altman results and the mean absolute percentage errors was presented for the verification of accuracy. In male students, there was a high correlation between the ultrasonie device and Dual Energy X-ray Absorptiometry in male (r=.92) and females (r =.71). The results of the Bland & Altman analysis showed that the confidence interval was stable and that the agreement was high. In the case of male students -13.4 ~ 2.9, the confidence interval range was shown. the mean absolute percentage errors was 28.6%. In the case of women the confidence interval ranged from -8.0 to -1.3, with mean absolute percentage errors of 17.2%. As a result, it was confirmed that the body fat rate validity between the ultrasonic measuring device and Dual Energy X-ray Absorptiometry was high.
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