Research Article
A Predictive Model for Acute Respiratory Distress Syndrome Mortality Using Red Cell Distribution Width
Table 3
Measures of discrimination and predictive ability.
| | Outcome | Category | Base model | Base model + RDW | Comparison value (95% CI) | p-value |
| AUC | ICU mortality | | 0.758 | 0.784 | 0.026 (0.000, 0.052) | 0.048 | In-hospital mortality | | 0.746 | 0.784 | 0.038 (0.007, 0.069) | 0.02 | 90-day mortality | | 0.755 | 0.793 | 0.039 (0.008, 0.069) | 0.01 |
| Net reclassification improvement (NRI) | | | | Net % improvement | NRI (95% CI) | | ICU mortality | Died | Reference | 2% | 0.463 (0.238–0.687) | 0.001 | Survived | Reference | 44% | In-hospital mortality | Died | Reference | 10% | 0.475 (0.258, 0.692) | <0.0001 | Survived | Reference | 37% | 90-day mortality | Died | Reference | 1% | 0.522 (0.311–0.733) | <0.001 | Survived | Reference | 51% |
| Integrated discrimination improvement (IDI) | | | Model average prediction | Model average prediction | IDI (95% CI) | | ICU mortality | Died | 0.478 | 0.498 | 0.032 (0.010–0.054) | 0.005 | Survived | 0.290 | 0.279 | In-hospital mortality | Died | 0.541 | 0.571 | 0.054 (0.029–0.080) | <0.001 | Survived | 0.363 | 0.339 | 90-day mortality | Died | 0.556 | 0.588 | 0.060 (0.033–0.086) | <0.001 | Survived | 0.365 | 0.339 |
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