Sensitivity, specificity, negative and positive likelihood ratios (LR) for RSI and RPI-S generated with Youden’s Index
| A) Subgroups Cut-off values | Sensitivity % | Specificity % | Negative LR | Positive LR |
| RSI ≥22 | 100 | 76 | 0.00 | 4.22 |
| RSI ≥32 | 100 | 93 | 0.00 | 14.99 |
| RPI-SSE ≥21 | 75 | 71 | 0.35 | 2.63 |
| RPI-SSE ≥32 | 75 | 91 | 0.28 | 8.06 |
| RPI-SS ≥19 | 83 | 74 | 0.23 | 3.17 |
| RPI-SS ≥28 | 100 | 89 | 0.00 | 9.09 |
| RPI-SP ≥21 | 91 | 86 | 0.11 | 6.54 |
| RPI-SP ≥29 | 100 | 93 | 0.00 | 14.29 |
| RPI-SMC ≥22 | 83 | 82 | 0.20 | 4.64 |
| RPI-SMC ≥24 | 100 | 77 | 0.00 | 4.27 |