Datta Banik Sudip, Dickinson Federico
Department of Human Ecology, Cinvestav-Merida, Mexico.
Anthropol Anz. 2015;72(4):369-83. doi: 10.1127/anthranz/2015/0525. Epub 2015 Aug 24.
Waist circumference (WC) as an index of central obesity is related to body mass index (BMI) and percent body fat (PBF). Waist circumference data were analyzed to identify a WC cut-off for adult women with respect to BMI-based obesity (≥ 30 kg/m²) and PBF. The sample was 138 women aged 22 to 41 years with Maya ancestry (based on surnames) in Merida, Yucatan, measured during 2011 - 2013. Anthropometric parameters included height, body weight (BW), and BMI. The PBF was estimated by bioelectrical impedance. Estimated cut-offs per centimeter WC (80 - 99 cm) were predicted by BMI for obesity (≥ 30 kg m⁻²; binomial: Yes = 1, No = 0) and PBF (continuous variable) using binary logistic regression analyses. Mean age was 32 years, mean BMI was 29 kg m(-2) and mean WC was 89 cm. The sample exhibited high PBF (44 %), and high rates of overweight (44%) and obesity (40%). The threshold WC (≥ 93 cm) had high sensitivity (80%), specificity (82%), Youden Index value (0.62), and correct classification rate (82%). The area under the receiver operating characteristic curve was 88 %. The WC ≥ 93 cm cut-off had corresponding values for mean BMI (34 kg m⁻²) and PBF (47%). The optimal WC cut-off at 93 cm significantly identified central obesity for BMI ≥ 30 kg m⁻² and PBF for this sample.
腰围（WC）作为中心性肥胖的指标，与体重指数（BMI）和体脂百分比（PBF）相关。对腰围数据进行分析，以确定成年女性基于BMI的肥胖（≥30 kg/m²）和PBF的WC临界值。样本为2011年至2013年期间在尤卡坦州梅里达市的138名年龄在22至41岁之间、有玛雅血统（根据姓氏）的女性。人体测量参数包括身高、体重（BW）和BMI。通过生物电阻抗法估算体脂百分比。使用二元逻辑回归分析，根据肥胖（≥30 kg m⁻²；二项式：是=1，否=0）和PBF（连续变量）的BMI预测每厘米WC（80至99厘米）的估计临界值。平均年龄为32岁，平均BMI为29 kg m⁻²，平均WC为89厘米。该样本显示出高体脂百分比（44%）、高超重率（44%）和肥胖率（40%）。临界WC（≥93厘米）具有高敏感性（80%）、特异性（82%）、约登指数值（0.62）和正确分类率（82%）。受试者工作特征曲线下面积为88%。WC≥93厘米的临界值对应的平均BMI为34 kg m⁻²，PBF为47%。93厘米的最佳WC临界值显著确定了该样本中BMI≥30 kg m⁻²的中心性肥胖和PBF情况。
