Parker Lisa, Reilly John J, Slater Christine, Wells Jonathan C K, Pitsiladis Yannis
Centre for Exercise Science and Medicine, West Medical Building, University of Glasgow, Glasgow, Scotland.
Obes Res. 2003 Jul;11(7):852-8. doi: 10.1038/oby.2003.117.
To determine the validity of the following six body composition methods against a reference method (three-component model): air displacement plethysmography (BODPOD); estimation from body density using BODPOD; skinfold thickness using the Slaughter equations; bioelectrical impedance, both leg-leg (TANITA) and hand-foot (Bodystat) approaches; and total body water.
Forty-two healthy white 10- to 14-year-old boys (mean age, 12.9 +/- 1.0 years) were enrolled in this study. Measures of body fat percentage and body fat mass derived from the three-component model were used as the reference method. Validity of all of the other methods was assessed by comparison against the reference by calculation of biases and limits of agreement.
Mean body fatness measured using the reference method was 16.4 +/- 11.6% and 8.7 +/- 7.0 kg. Estimates of fatness from total body water had the narrowest limits of agreement relative to the reference (+0.9 +/- 5.0% body fat; +0.5 +/- 2.9 kg fat mass). For all other methods tested, we observed large biases and very wide limits of agreement.
This study suggests that the validity of newer field and laboratory methods for estimation of body composition is poor in adolescent boys. For applications where high accuracy of estimation at the individual level is essential, only reference methods would be acceptable.
相对于参考方法（三分模型），确定以下六种身体成分测量方法的有效性：空气置换体积描记法（BODPOD）；使用BODPOD通过身体密度进行估算；使用斯劳特方程测量皮褶厚度；生物电阻抗法，包括双腿（百利达）和手足（Bodystat）测量方法；以及总体水含量测量法。
本研究纳入了42名10至14岁健康的白人男孩（平均年龄12.9±1.0岁）。来自三分模型的体脂百分比和体脂量测量值用作参考方法。通过计算偏差和一致性界限，将所有其他方法与参考方法进行比较，评估其有效性。
使用参考方法测得的平均体脂率为16.4±11.6%，平均体脂量为8.7±7.0千克。相对于参考方法，通过总体水含量估算体脂率的一致性界限最窄（体脂率+0.9±5.0%；体脂量+0.5±2.9千克）。对于所有其他测试方法，我们观察到较大的偏差和非常宽的一致性界限。
本研究表明，在青少年男孩中，用于估算身体成分的新型现场和实验室方法的有效性较差。对于在个体水平上需要高精度估算的应用，只有参考方法是可接受的。
