ABSTRACT

The objective of this study was to assess the reliability and minimal detectable change (MDC) of the Styku S100 3-dimensional (3D) scanner. Thirty-three participants completed two visits separated by 1–3 days; at each visit, two scans were performed. Intra-class correlation co-efficients (ICCs) and MDC values based on a 90% confidence interval (MDC₉₀) were calculated. For body fat percentage, within-day ICC and MDC₉₀ values were 0.997 and 1.1%, respectively, and these values changed to 0.989 and 2% when using single scans on separate days. For 21 circumference sites, 10 of the within-day ICCs were ≥ 0.99 and 20 of the MDC₉₀ values were < 2 cm. Comparatively, five ICCs were ≥ 0.99 and 15 MDC₉₀ values were < 2 cm when using single scans on separate days. In conclusion, between-visit differences of 1-2% for body fat percentage and 1–2 cm for most circumference values are needed to exceed typical measurement error.

摘要

这项研究的目的是评估Styku S100 3维（3D）扫描仪的可靠性和最小可检测变化（MDC）。33名参与者完成了两次访问，相隔1-3天；每次拜访时，都要进行两次扫描。基于90％置信区间（MDC ₉₀）计算了类内相关系数（ICC）和MDC值。对于体内脂肪百分比，当日ICC和MDC ₉₀值分别为0.997和1.1％，而在不同日期使用单次扫描时，这些值分别变为0.989和2％。对于21个圆周部位，一天之内的10个ICC≥0.99，MDC _90的20个ICC小于2 cm。相比之下，五个ICC≥0.99，15个MDC ₉₀在单独的日子中使用单次扫描时，值<2 cm。总之，两次身体脂肪百分比的访问之间差异为1-2％，大多数圆周值的访问间隔差异为1-2 cm，才能超过典型的测量误差。