Table 2.
Test characteristics of PARDSEVERE
| Variable | Value | 95% CI |
|---|---|---|
| Derivation (n = 122, 18 non-survivors) | ||
| True negatives | 68 | - |
| False positives | 36 | - |
| True positives | 18 | - |
| False negatives | 0 | - |
| Sensitivity | 1 | 0.78 to 1 |
| Specificity | 0.65 | 0.55 to 0.74 |
| Positive predictive value | 0.33 | 0.21 to 0.48 |
| Negative predictive value | 1 | 0.93 to 1 |
| Positive likelihood ratio | 2.9 | 2.2 to 3.8 |
| Negative likelihood ratio | - | - |
| Area under ROC curve | 0.85 | 0.78 to 0.92 |
| Test (n = 30, 6 non-survivors) | ||
| True negatives | 17 | - |
| False positives | 7 | - |
| True positives | 5 | - |
| False negatives | 1 | - |
| Sensitivity | 0.83 | 0.36 to 0.99 |
| Specificity | 0.71 | 0.49 to 0.87 |
| Positive predictive value | 0.42 | 0.16 to 0.71 |
| Negative predictive value | 0.94 | 0.71 to 1 |
| Positive likelihood ratio | 2.9 | 1.4 to 5.9 |
| Negative likelihood ratio | 0.2 | 0 to 1.4 |
| Area under ROC curve | 0.82 | 0.62 to 1 |