Martin-Calvo Nerea, Moreno-Galarraga Laura, Martinez-Gonzalez Miguel Angel
Department of Preventive Medicine and Public Health, University of Navarre, Pamplona 31009, Spain.
Navarra Institute for Health Research (IdisNa), Pamplona 31008, Spain.
Nutrients. 2016 Aug 20;8(8):512. doi: 10.3390/nu8080512.
Obesity is defined as an abnormal or excessive fat accumulation that may impair health. Dual-energy X-ray absorptiometry (DEXA) has been suggested as the gold standard to define obesity, but because its use is complex and expensive, anthropometric measures such as body mass index (BMI) or the waist-to-height ratio (WtHr) have been used as alternatives. The aim of this study was to review the published literature and investigate the correlation of BMI and WtHr with body fat (BF) measured by DEXA in pediatric populations. References were sought in PubMed/Medline and Embase datasets. Five original articles, published between 2013 and 2015, were finally included in this review. Their sample size ranged from 83 to 5355, and the age of participants ranged from 4.9 to 19 years old. The most frequently reported association measurements were the coefficients of determination (R²), followed by correlation coefficients and least-squares regression coefficients. BF measured by DEXA was strongly correlated with both BMI (R² ranging from 0.32 to 0.91) and WtHr (R² ranging from 0.49 to 0.73). Thus, either BMI or WtHr may be useful to define obesity when more sophisticated techniques are not available. Our systematic review of the available literature found that neither index demonstrated superiority in assessing obesity in children.
肥胖被定义为可能损害健康的异常或过度脂肪堆积。双能X线吸收法（DEXA）被认为是定义肥胖的金标准，但由于其使用复杂且昂贵，体重指数（BMI）或腰高比（WtHr）等人体测量指标已被用作替代方法。本研究的目的是回顾已发表的文献，并调查儿科人群中BMI和WtHr与通过DEXA测量的体脂（BF）之间的相关性。在PubMed/Medline和Embase数据集中检索参考文献。最终，本综述纳入了2013年至2015年间发表的五篇原创文章。它们的样本量从83到5355不等，参与者的年龄从4.9岁到19岁。最常报告的关联测量指标是决定系数（R²），其次是相关系数和最小二乘回归系数。通过DEXA测量的BF与BMI（R²范围为0.32至0.91）和WtHr（R²范围为0.49至0.73）均密切相关。因此，当没有更复杂的技术时，BMI或WtHr均可用于定义肥胖。我们对现有文献的系统综述发现，在评估儿童肥胖方面，这两个指标均未显示出优势。
