Presence of at least one risk factor of having type 2 diabetes or hypertension in different BMI categories are shown in Table III.
Curve was plotted based on ROC analysis at different cut-off values of BMI while taking percentage of body fat as standard (Table IV, Fig. 2). Area under the curve was between 85 to 88 per cent which is considered good fit in discriminating the population with body fat below and above 25 per cent. Sensitivity and specificity at cut-off level of BMI at 24.5 was 83.2 and 77.5, respectively. Sensitivity at BMI cut-off > 25 kg/m2 was reduced by 5 per cent and specificity increased by 4.6 per cent compared to 24.5 kg/m2. There was a minimum misclassification rate of 19.8 per cent at BMI cut-off 24.5 kg/m2 compared to 21.3 per cent at >25 kg/m2.