Table 2 Calculated values of sensitivity, specificity, ROC area, predictive values, likelihood ratios and odds ratio
| Â | Â | 95% confidence interval | ||
|---|---|---|---|---|
Sensitivity | Pr(+/A) | 84.8% | 68.1% | 94.9% |
Specificity | Pr(−/N) | 92.3% | 83% | 97.5% |
ROC area | (Sens. + Spec.)/2 | .886 | .816 | .956 |
Positive predictive value | Pr(A/+) | 84.8% | 68.1% | 94.9% |
Negative predictive value | Pr(N/−) | 92.3% | 83% | 97.5% |
Likelihood ratio (+) | Pr(+/A)/Pr(+/N) | 11 | 4.69 | 25.9 |
Likelihood ratio (−) | Pr(−/A)/Pr(−/N) | .164 | .073 | .369 |
Odds ratio | LR(+)/LR(−) | 67.2 | 18.4 | 245 |