Table 3.

AUC and optimal cut-off points of anthropometric indices in relation to incidence of hypertension in both groups.

Anthropometric indices	AUC	95% CI	P value	Cut-off point	Sensitivity (%)	Specificity (%)	Youden Index
Group 1
WC (cm)	0.692	0.598–0.787	<0.001	84.5	0.581	0.272	0.309
BMI (kg/m2)	0.593	0.484–0.702	0.087	25.4	0.387	0.185	0.202
WHR	0.671	0.568–0.775	0.002	0.859	0.548	0.230	0.318
WHtR	0.682	0.591–0.772	0.001	0.516	0.710	0.319	0.390
Group 2
WC (cm)	0.615	0.553–0.677	<0.001	91.5	0.405	0.193	0.212
BMI (kg/m2)	0.587	0.525–0.650	0.006	26.2	0.446	0.272	0.175
WHR	0.597	0.534–0.660	0.002	0.862	0.587	0.386	0.201
WHtR	0.604	0.542–0.667	0.001	0.550	0.479	0.291	0.188

Group 1, ideal blood pressure group; Group 2, pre-hypertensive group. WC – waist circumference; BMI – body mass index; WHR – waist-hip ratio; WHtR – waist-height ratio; AUC – area under the receiver operating characteristic curve; CI – confidence interval.