Faculdade de Educação Física e Fisioterapia, Universidade Federal do Amazonas, Manaus, Brazil.
Laboratório de Biomecânica, Centro de Desportos, Universidade Federal de Santa Catarina, Florianópolis, Brazil.
Eur J Clin Nutr. 2017 Nov;71(11):1341-1344. doi: 10.1038/ejcn.2017.18. Epub 2017 Mar 15.
BACKGROUND/OBJECTIVES: The aim of this study was to verify the agreement between body fat percentage (%BF) values evaluated by air displacement plethysmograph (ADP) and body adiposity index (BAI) in adults with Down's syndrome (DS).
SUBJECTS/METHODS: Forty-five adults with DS volunteered to participate in this study (19 women; age 28.7±8.5 years and 26 men; age 29.1±8.8 years). The %BF was measured by ADP (%BF) and estimated by anthropometric measures [%BF=(hip circumference/height)-18] (%BF). Agreement between methods was evaluated by paired t-test, Pearson's correlation coefficient and Bland-Altman analysis.
Although high correlation coefficients were found between %BF and %BF for women (r=0.78, P<0.05) and men (r=0.87, P<0.05), significant differences were observed between methods for both sexes (38.9±8.9 vs 42.5±8.5% for women, and 25.8±11.3 vs 32.6±5.4% for men in %BF and %BF, respectively). Moreover, Bland-Altman analysis showed that the mean error estimate was +3.6 (95%CI, -7.59 to 14.79) in women and +6.74 (95%CI, -7.25 to 20.72) in men.
The results indicate that BAI seems to be a limited method to evaluate %BF in women and in men with DS.
背景/目的：本研究旨在验证空气置换体积描记法（ADP）和身体脂肪指数（BAI）评估唐氏综合征（DS）成人体脂肪百分比（%BF）值的一致性。
受试者/方法：45 名唐氏综合征成人自愿参加本研究（19 名女性；年龄 28.7±8.5 岁和 26 名男性；年龄 29.1±8.8 岁）。通过 ADP（%BF）和通过人体测量学指标估计的体脂肪百分比 [%BF=（臀围/身高）-18]（%BF）测量%BF。通过配对 t 检验、Pearson 相关系数和 Bland-Altman 分析评估方法之间的一致性。
尽管女性（r=0.78，P<0.05）和男性（r=0.87，P<0.05）之间的%BF 和 %BF 之间发现了高相关系数，但两种方法之间均存在显著差异（女性为 38.9±8.9%比 42.5±8.5%，男性为 25.8±11.3%比 32.6±5.4%）。此外，Bland-Altman 分析表明，女性的平均误差估计值为+3.6（95%CI，-7.59 至 14.79），男性为+6.74（95%CI，-7.25 至 20.72）。
结果表明，BAI 似乎是一种评估女性和男性 DS 中 %BF 的有限方法。
