Okafor Christian I, Raimi Taiwo H, Gezawa Ibrahim D, Sabir Anas A, Enang Ofem, Puepet Fabian, Fasanmade Olufemi A, Ofoegbu Esther N, Odusan Olatunde
Department of Medicine, University of Nigeria, Enugu Campus/University of Nigeria Teaching Hospital, Ituku Ozalla, Enugu, Enugu State, Nigeria.
Department of Medicine, Ekiti State University/Ekiti State University Teaching Hospital, Ado Ekiti, Ekiti State, Nigeria.
Ann Afr Med. 2016 Oct-Dec;15(4):185-193. doi: 10.4103/1596-3519.194275.
Waist circumference (WC) is a simple tool for measuring central obesity in routine clinic settings. Gender- and ethnic-specific optimal cutoff points for WC are encouraged for populations lacking such data.
To derive WC cutoff values, predictive of overweight and obesity in Nigerians and to evaluate the performance of currently recommended values.
Apparently, healthy urban dwellers from six cities spread across Nigeria were selected for this cross-sectional study. Biophysical profiles such as blood pressure and anthropometric indices were measured according to the World Health Organization's STEPs instrument protocol. Receiver operating characteristics curve analysis was used to determine the optimal cutoff levels using the decision rule of maximum (sensitivity + specificity). The level of significance was set at P< 0.05.
A total of 6089 subjects (3234 males and 2855 females) were recruited for the study. WC demonstrated a high area under the curve in both genders. Selected cutoff points ranged from 83 to 96 cm with high sensitivities and specificities.
The currently recommended gender-specific WC cutoff values proved inappropriate in this study group, but WC remains a reliable tool for measuring obesity.
腰围（WC）是在常规临床环境中测量中心性肥胖的一种简单工具。对于缺乏此类数据的人群，鼓励采用针对性别和种族的腰围最佳切点。
得出可预测尼日利亚人超重和肥胖的腰围切点值，并评估当前推荐值的性能。
显然，本横断面研究选取了来自尼日利亚六个城市的健康城市居民。根据世界卫生组织的“STEPS”仪器方案测量血压和人体测量指数等生物物理特征。采用受试者工作特征曲线分析，使用最大（敏感性+特异性）的决策规则确定最佳切点水平。显著性水平设定为P<0.05。
共招募了6089名受试者（3234名男性和2855名女性）参与研究。腰围在男女两性中均显示出较高的曲线下面积。选定的切点范围为83至96厘米，具有较高的敏感性和特异性。
在该研究组中，目前推荐的性别特异性腰围切点值被证明不合适，但腰围仍然是测量肥胖的可靠工具。
