Table 4.
Area under ROC curve (AUC), optimal cutoff values, sensitivities, specificities, and Youden index of anthropometric indices in predicting MSyn.
| Variables | AUC (95% CIs) | Cutoff | Sensitivity (95% CIs) | Specificity (95%CIs) | Youden index |
|---|---|---|---|---|---|
| Total | |||||
| BMI | 0.81 (0.78–0.84) | > 28.4 | 77.88 | 73.79 | 0.5167 |
| WC | 0.80 (0.77–0.83) | > 98.5 | 71.03 | 78.16 | 0.4919 |
| BRI | 0.83 (0.80–0.86) | > 5.133 | 77.57 | 79.77 | 0.5734 |
| ABSI | 0.58 (0.54–0.62) | > 0.0853 | 24.92 | 88.97 | 0.1389 |
| VAI | 0.82 (0.79–0.85) | > 5.55231 | 71.34 | 77.7 | 0.4904 |
| CI | 0.69 (0.65–0.73) | > 1.325 | 47.98 | 81.38 | 0.2935 |
| WHtR | 0.83 (0.80–0.86) | > 0.586 | 77.88 | 78.85 | 0.5673 |
| Males | |||||
| BMI | 0.80 (0.76–0.84) | > 27.4 | 81.65 | 69.44 | 0.5109 |
| WC | 0.83 (0.79–0.87) | > 102 | 77.22 | 82.54 | 0.5975 |
| BRI | 0.84 (0.80–0.87) | > 5.296 | 77.85 | 83.73 | 0.6158 |
| ABSI | 0.64 (0.59–0.69) | > 0.0843 | 45.75 | 76.59 | 0.2216 |
| VAI | 0.83 (0.79–0.87) | > 6.2842 | 70.25 | 82.94 | 0.5319 |
| CI | 0.76 (0.71–0.8) | > 1.325 | 74.05 | 71.43 | 0.4548 |
| WHtR | 0.84 (0.80–0.87) | > 0.594 | 78.48 | 83.33 | 0.6181 |
| Females | |||||
| BMI | 0.82 (0.77–0.86) | > 26.8 | 92.02 | 85.2 | 0.5213 |
| WC | 0.83 (0.78–0.87) | > 88 | 87.73 | 69.95 | 0.5768 |
| BRI | 0.83 (0.79–0.87) | > 4.695 | 85.89 | 73.22 | 0.5911 |
| ABSI | 0.60 (0.54–0.66) | > 0.07484 | 65.03 | 54.64 | 0.1968 |
| VAI | 0.81 (0.77–0.86) | > 4.04102 | 85.89 | 61.75 | 0.4764 |
| CI | 0.73 (0.68–0.79) | > 1.193 | 75.46 | 60.66 | 0.3612 |
| WHtR | 0.83 (0.78–0.87) | > 0.565 | 81.12 | 71.04 | 0.5815 |
Discriminatory power of the anthropometric indices as classifiers for MSyn presence was determined by ROC curve. AUCs and the 95%CI were used to compare the discriminatory power of each index. Sensitivity was defined as the percentage of true positive scores according to the MSyn presence. Specificity was defined as the proportion of scores identified incorrectly. Optimal cutoff points for all seven obesity indicators were determined with Youden's J (J max. = Sensitivity + Specificity– 1)
ROC Receiver operative characteristic curve, AUC area under the curve, CIs confidence intervals, MSyn Metabolic Syndrome, BMI body mass index, WC waist circumference, BRI body roundness index, ABSI a body shape index, VAI Visceral Adiposity Index, CI conicity index, WHtR Waist-to-height ratio.