Table 4.
Cut-off points, areas under the receiver-operating characteristic curve (AUC), sensitivity and specificity for waist circumference (WC), waist-to-height ratio (WHtR) and BMI in the prediction of hypertension for females by age group (years). National Health Survey, Brazil, 2013 (n 32 351)
| Cut-off point | AUC | 95 % CI | Sensitivity (%) | Specificity (%) | |
|---|---|---|---|---|---|
| WC (cm) | |||||
| 20–30 | 85·0 | 0·653 | 0·624, 0·683 | 61·7 | 62·0 |
| 31–40 | 89·1 | 0·656 | 0·639, 0·673 | 61·6 | 61·0 |
| 41–50 | 91·1 | 0·647 | 0·632, 0·662 | 61·0 | 59·8 |
| 51–60 | 93·1 | 0·654 | 0·639, 0·670 | 62·0 | 61·3 |
| >60 | 93·2 | 0·619 | 0·605, 0·634 | 59·0 | 58·5 |
| WHtR | |||||
| 20–30 | 0·53 | 0·656 | 0·627, 0·685 | 62·5 | 62·5 |
| 31–40 | 0·56 | 0·657 | 0·640, 0·674 | 61·4 | 61·4 |
| 41–50 | 0·58 | 0·651 | 0·636, 0·665 | 61·0 | 61·0 |
| 51–60 | 0·60 | 0·655 | 0·640, 0·671 | 61·8 | 61·8 |
| >60 | 0·61 | 0·626 | 0·611, 0·641 | 59·1 | 59·2 |
| BMI (kg/m2) | |||||
| 20–30 | 25·23 | 0·641 | 0·612, 0·671 | 60·3 | 60·3 |
| 31–40 | 26·88 | 0·642 | 0·625, 0·659 | 60·3 | 60·3 |
| 41–50 | 27·39 | 0·629 | 0·614, 0·644 | 59·3 | 59·3 |
| 51–60 | 27·49 | 0·638 | 0·623, 0·654 | 60·1 | 60·1 |
| >60 | 26·48 | 0·598 | 0·583, 0·613 | 57·1 | 57·2 |