Iwaoka H, Yokoyama T, Nakayama T, Matsumura Y, Yoshitake Y, Fuchi T, Yoshiike N, Tanaka H
Department of Epidemiology, Tokyo Medical and Dental University, Japan.
J Nutr Sci Vitaminol (Tokyo). 1998 Aug;44(4):561-8. doi: 10.3177/jnsv.44.561.
The reliability and validity of two newly developed densitometric methods for determining the human body volume and percent body fat (%FAT), the sulfur hexafluoride dilution method (SHF) and air displacement plethysmography (ADP), were evaluated in comparison with the underwater weighing method (UWW). Seven healthy male volunteers (age 31 to 44, mean height 166.0 cm, weight 61.4 kg) participated in this study. The same-day test-retest coefficients of variation (CVs) for body volume and %FAT measurements were not significantly different among the three methods. SHF and UWW showed a strong correlation in terms of body volume and %FAT, with the correlation coefficients (r) being 0.9997 and 0.986, respectively. The correlation between ADP and UWW was slightly weaker (r = 0.9997 for body volume and 0.907 for %FAT). However, body volumes measured by SHF and ADP were significantly different from that by UWW when compared by mean values. Such differences were also found for %FAT measurements. The regression lines of body volume measured by SHF and ADP on that by UWW were almost equivalent to the line of identity. However, those of %FAT measured by SHF and ADP on that by UWW were significantly different from the line of identity. Because the reliability of SHF and ADP appeared to be high, further validation and improvement are required and worth doing.
与水下称重法（UWW）相比，评估了两种新开发的用于测定人体体积和体脂百分比（%FAT）的密度测量方法——六氟化硫稀释法（SHF）和空气置换体积描记法（ADP）的可靠性和有效性。七名健康男性志愿者（年龄31至44岁，平均身高166.0厘米，体重61.4千克）参与了本研究。三种方法在人体体积和%FAT测量方面的同日重测变异系数（CVs）无显著差异。SHF和UWW在人体体积和%FAT方面显示出很强的相关性，相关系数（r）分别为0.9997和0.986。ADP和UWW之间的相关性稍弱（人体体积r = 0.9997，%FAT r = 0.907）。然而，通过平均值比较时，SHF和ADP测量的人体体积与UWW测量的有显著差异。%FAT测量也发现了此类差异。SHF和ADP测量的人体体积相对于UWW测量的回归线几乎等同于恒等线。然而，SHF和ADP测量的%FAT相对于UWW测量的回归线与恒等线有显著差异。由于SHF和ADP的可靠性似乎较高，因此需要进一步验证和改进，且值得进行。
