Narksawat K, Podang J, Punyarathabundu P, Podhipak A
Department of Epidemiology, Faculty of Public Health, Mahidol University, Bangkok, Thailand.
Asia Pac J Public Health. 2007;19(3):10-5. doi: 10.1177/101053950701900303.
Body mass index (BMI) and waist circumference (WC) are important contributors to major causes of health risk factors such as high blood cholesterol, high fasting blood sugar and high blood pressure. This analysis was designed to assess the associations between WC, BMI and each health risk factor in suitable cut-off points for WC and BMI among middle aged men and women of Thai population. Cross sectional data from the Second National Health Survey in Thailand was analysed. This set of data collected by the Ministry of Public Health from 1996 to 1997 was obtained from a total of 998 subjects (comprising 396 men and 602 women) aged 45-50. Results from the Receiver Operating Characteristic curve (ROC curve) identified those with health risk factors demonstrating cut-off points for WC between 81.5-84 centimeters for men and 76-80.5 centimeters for women and BMI between 23.3-23.9 kg/m2 for both genders, respectively. Results from the Multiple logistic regression analysis demonstrated lower risks of having high blood cholesterol, high fasting blood sugar and high blood pressure with cutoff points 84 cm for men, 80 cm for women and BMI 23 kg/m2 for both genders compared to cut-off points 102 cm for men, 88 cm for women and BMI 25 kg/m2 for both genders as specified for the population in Western countries. This study has proposed a waist circumference of 84 cm (33.6 inches) for middle aged Thai men and 80 cm (32 inches) for middle aged Thai women and BMI of 23 kg/m2 for both genders. Monitoring changes in the waist circumference over time along with BMI may be convenient and useful for middle aged Thais to prevent health risk conditions, even in the absence of a change in BMI.
体重指数（BMI）和腰围（WC）是导致高胆固醇血症、空腹血糖升高和高血压等主要健康风险因素的重要因素。本分析旨在评估泰国中年男性和女性中，WC、BMI与每种健康风险因素在合适的WC和BMI切点之间的关联。对泰国第二次全国健康调查的横断面数据进行了分析。泰国公共卫生部在1996年至1997年收集的这组数据来自998名受试者（包括396名男性和602名女性），年龄在45至50岁之间。受试者工作特征曲线（ROC曲线）的结果确定，患有健康风险因素的男性WC切点在81.5至84厘米之间，女性在76至80.5厘米之间，男女BMI切点均在23.3至23.9千克/平方米之间。多因素逻辑回归分析结果表明，与西方国家人群规定的男性102厘米、女性88厘米和男女BMI 25千克/平方米的切点相比，男性WC切点为84厘米、女性为80厘米和男女BMI为23千克/平方米时，患高胆固醇血症、空腹血糖升高和高血压的风险较低。本研究建议泰国中年男性腰围为84厘米（33.6英寸），中年女性腰围为80厘米（32英寸），男女BMI均为23千克/平方米。即使BMI没有变化，对泰国中年人来说，随时间监测腰围变化以及BMI可能对预防健康风险状况方便且有用。
