Dual-energy X-ray absorptiometry (DXA) and adipose tissue percentage estimates (AT%) derived from regression based skinfold equations were compared. 35 Gaelic games players [20.9 ± 1.7 years; 78.1 ± 8.6 kg; 179.5 ± 5.7 cm] underwent whole body fan beam DXA scans following a standardised protocol and assessment of skinfold thickness at 8 sites. Adipose tissue% from the sum of skinfolds and/or via body density were calculated for general and athlete specific equations (SKf-AT %). The relationship, i. e., proportional bias, fixed bias and random error (SEE) between DXA-AT % and AT % derived from the 6 skinfold equations were determined using least squares regression analysis. Skinfold AT% estimates were underestimated relative to DXA-AT % across all skinfold equations except that of Durnin and Wormersley [9] (D&W-∑(4AT %)) (16.7 ± 3.4 vs. 16.6 ± 4.0 %). All equations demonstrated 95 % prediction intervals ranges exceeding ~10 %. Each equation failed to predict AT% relative to DXA within an accepted ± 3.5 % anthropometric error rate. It is recommended that the conversion of absolute skinfold thickness to an AT % is avoided and that the skinfold equations assessed herein are not utilised in Gaelic games players. Alternate 'sum of skinfold' approaches should be considered.

译文

比较了基于回归的皮褶方程得出的双能x射线吸收法 (DXA) 和脂肪组织百分比估计值 (AT %)。35名盖尔游戏玩家 [20.9 ± 1.7岁; 78.1 ± 8.6公斤; 179.5 ± 5.7厘米] 进行了全身扇形束DXA扫描,遵循标准化协议并评估了8个地点的皮褶厚度。对于一般方程和运动员特定方程 (SKf-AT %),计算来自皮褶和/或通过身体密度的脂肪组织 %。使用最小二乘回归分析确定了从6个皮褶方程得出的DXA-AT % 和AT % 之间的关系,即比例偏差,固定偏差和随机误差 (参见)。除了Durnin和Wormersley [9] (D & W-∑(4AT %)) (16.7 ± 3.4对16.6 ± 4.0%) 之外,在所有的皮褶方程中,皮褶AT % 估计值相对于DXA-AT % 被低估。所有方程都证明了95% 预测间隔范围超过 ~ 10%。在接受的 ± 3.5% 人体测量错误率内,每个方程都无法预测相对于DXA的AT %。建议避免将绝对皮褶厚度转换为AT %,并且此处评估的皮褶方程式不在盖尔游戏玩家中使用。应该考虑替代的 “皮肤折叠总和” 方法。

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