目的  通过对颈围与肥胖关系的分析，探讨颈围对肥胖预测的可行性，进而为早期预防肥胖及相关疾病提供参考。    方法  选取临高人、黎族、羌族、白马人4个族群共1859名成人（男性911名，女性948名）作为研究对象，分别将其颈围与身体质量指数（BMI）、体脂率、内脏脂肪等级、腰围、腰臀比、身体肥胖指数 6项国内外公认的肥胖指标进行相关性分析、u 检验及受试者工作特征（ROC）曲线分析和 Kappa 一致性检验。    结果  颈围与其他几种肥胖指标均具有显著正相关性，与身体肥胖指数和腰臀比相关性最小，与腰围、内脏脂肪等级、体脂率相关性较大，与BMI相关性最大。不同肥胖指标判断的肥胖组颈围均值都大于正常组，且差异具有统计学意义。ROC曲线分析和 Kappa 一致性检验表明，颈围与各项肥胖指标的曲线下面积（AUC）均>0.7，且颈围与BMI和腰围在判断肥胖时一致性最好。    结论  当男性颈围值>临界切点值364.5时，女性颈围值>319.5时，可预测为BMI值达到超重或肥胖；而男性颈围值>370.5，女性颈围值>319.5时，可以预测腰围超标，中心性肥胖的危险性增大。

Objective  To study the feasibility of neck circumference on the prediction of obesity by analyzing the relationship between the neck circumference and the obesity, and to provide the reference for the early prevention of obesity and related diseases.   Methods  A total of 1859 adults (911 males and 948 females) were selected from the four ethnic groups of Lingao, Li, Qiang and Baima as the subject of the study. The correlation between the neck circumference and body mass index（BMI）, percent body fat, visceral fat index, waist circumference, waist hip ratio and body adiposity index were analyzed by correlation analysis, u test and receiver operating characteristic（ROC）curve analysis and Kappa consistency test.    Results  Neck circumference has significant positive correlations with several other obesity indicators. It has the least correlation with body adiposity index and waist hip ratio, and has greater correlation with waist circumference, visceral fat index, and percent body fat, and has the largest correlation with BMI. The average values of the neck circumference of the obesity group judged by different obesity indicators are larger than the normal group, and the difference is statistically significant. ROC curve analysis and Kappa consistency test show that the area under curve（AUC）of neck circumference and various obesity indicators are greater than 0.7, and the consistency of neck circumference, BMI and waist circumference is the best when judging obesity.    Conclusion  If the value of male neck circumference is greater than the critical cut point value 364.5, the female neck circumference value is greater than 319.5, which can be predicted that the BMI value is overweight or obese. When the neck circumference of male is greater than 370.5 and the neck circumference of female is greater than 319.5, it can be predicted that the waist circumference exceeds the standard, and the risk of central obesity increases.