Table 2

Area under ROC curve (AUC), optimal cut-off values, sensitivities, specificities and Youden index of anthropometric indices in predicting high blood pressure according to sex in group A

Body composition indicesAUC
(95% CI)
P valueCut-off valueSensitivity (%)
(95% CI)
Specificity (%)
(95% CI)
Youden indexχ²*P value*
Total (n=513)
 BMI-for-age z-score0.835 (0.782 to 0.889)<0.0011.4768.9(0.556 to 0.798)83.6 (0.798 to 0.869)0.5250.620.433
 WC percentile0.828 (0.768 to 0.888)<0.00173.080.3 (0.678 to 0.890)72.1 (0.677 to 0.762)0.5250.150.703
 WHtR0.823 (0.759 to 0.887)<0.0010.4490.2 (0.791 to 0.959)63.7 (0.591 to 0.681)0.539
 ABSI0.735 (0.662 to 0.809)<0.0010.1468.9 (0.556 to 0.798)71.5 (0.670 to 0.755)0.40319.63<0.001
Males (n=211)
 BMI-for-age z-score0.817 (0.723 to 0.912)<0.0011.8769.2 (0.481 to 0.849)84.3 (0.781 to 0.891)0.5362.380.123
 WC percentile0.781 (0.671 to 0.891)<0.00178.057.7 (0.372 to 0.760)90.8 (0.855 to 0.944)0.4850.300.581
 WHtR0.789 (0.675 to 0. 903)<0.0010.5265.4 (0.444 to 0.821)87.6 (0.817 to 0.918)0.530
 ABSI0.709 (0.577 to 0.841)<0.0010.1565.4 (0.444 to 0.821)85.4 (0.793 to 0.900)0.50810.350.001
Females (n=302)
 BMI-for-age z-score0.854 (0.793 to 0.916)<0.0011.1871.4 (0.535 to 0.848)83.5 (0.784 to 0.877)0.5490.000.985
 WC percentile0.863 (0.798 to 0.927)<0.00173.085.7 (0.690 to 0.946)74.2 (0.684 to 0.792)0.5990.190.667
 WHtR0.854 (0.781 to 0.927)<0.0010.4594.3 (0.795 to 0.990)65.9 (0.599 to 0.716)0.602
 ABSI0.756 (0.670 to 0.843)<0.0010.1482.9 (0.657 to0.928)62.9 (0.568 to 0.687)0.45811.720.001
  • *Comparison of the AUC value of WHtR with the other anthropometric indices.

  • ABSI, a body shape index; AUC, area under the curve; BMI, body mass index; ROC, receiver operating characteristic; WC, waist circumference; WHtR, waist-to-height ratio.