Table 2 Diagnostic accuracy of RI-CRA to discriminate controls and cases using ROC curve analysis
Group | Criterion (cut off) value | Sensitivity (95% CI | Specificity (95% CI) | +PV | −PV | AUC | Z value | p value |
|---|---|---|---|---|---|---|---|---|
NO DR | > 0.68 | 100.00 (84.4–100.0) | 95.45 (77.1–99.2.) | 95.7 | 100.0 | 0.999 | 100.69 | < 0.001 |
NPDR | > 0.69 | 76.00 (54.9–90.6) | 100.00 (84.4–100.0) | 100.0 | 78.6 | 0.841 | 5.87 | < 0.001 |
PDR | > 0.69 | 95.45 (77.1–99.2) | 100.00 (84.4–100.0) | 100.0 | 95.7 | 0.955 | 13.76 | < 0.001 |
Total | > 0.69 | 88.41 (78.4–94.8) | 100.00 (84.4–100.0) | 100.0 | 73.3 | 0.928 | 16.22 | < 0.001 |