The optimal cut-off points of body mass index which reflect the risk factors of cardiovascular disease in urban Thai male population

Abstract

The objective of this cross sectional research was to examine the optimal cutoff points of body mass index which reflect the risk factors of cardiovascular disease in the urban Thai male population. The cardiovascular risk factors were hypertension and dyslipidemia. Thai males aged 35-50 years who worked and lived in Bangkok were surveyed. These respondents were 413 government officers who answered questionnaires regarding demographic and health data. Their weight and height were measured for calculating body mass index (BMI). Measurement of blood pressure and collection of blood samples for blood chemical analysis were performed. SPSS and epidemiological methods (sensitivity, specificity and ROC curve analysis) were used for data analysis. Results show that more than 50 percent of respondents were overweight when using the Asia criteria of BMI >=23 kg/m2. While, the prevalence of overweight respondents using the WHO criteria of BMI >=25 kg/m2 was 32.7 percent. The mean BMI level of the respondents increased proportionately with blood pressure (SPB and DBP), TC and LDL-C, except, TG. Increasing of HDL-C levels reversed proportionately with BMI level. The optimal cut-off point of BMI which reflected hypertension was 23.5 kg/m2. The optimal cut-off points of BMI which reflected high risk in TC, TG, LDL-C, and HDL-C were 22.0, 23.5, 23.0, and 24.0 kg/m2, respectively. The findings indicate that the cut-off points of BMI that reflect the risk factors of cardiovascular disease in this study were lower than WHO criteria but was almost matching the Asia criteria. Therefore, the cut-off points of BMI according to WHO criteria may not be appropriate for the Thai male population. These results demonstrate that if the physicians approach to specifying overweight as a BMI of >=25 kg/m2 is taken as an indication for therapeutic intervention, then the Thai male population will be ignored despite the profound relationship of weight gain to cardiovascular risk factors and incidence of disease such as hypertension and dyslipidem;"การศึกษานี้เป็นการวิจัยแบบภาคตัดขวาง มีวัตถุประสงค์เพื่อศึกษาหาจุดตัดของดัชนีมวลกายที่สามารถ สะท้อนปัจจัยเสี่ยงต่อการเกิดโรคหัวใจและหลอดเลือดในกลุ่มประชากรชายไทยที่อาศัยอยู่ในเขตเมือง ปัจจัยเสี่ยง ที่สำ คัญต่อการเกิดโรคหัวใจและหลอดเลือด คือ ภาวะความดันโลหิตสูง และความผิดปกติของระดับไขมันใน เลือด กลุ่"