Accuracy and validity of models predicting death before discharge
| Predictive model | Area under the ROC curve Az, (SE) | Hosmer- Lemeshow χ2(p value) |
|---|---|---|
| Log odds death −2.0044 + (0.0034 × birth weight) | 0.70 (0.05) | 9.32 ( 0.50) |
| Log odds death −10.7097 + (0.4423 × gestation) | 0.74 (0.08) | 9.27 (0.51) |
| Log odds death 4.0334 − (1.6584 × USS2-150) − (0.4004 × CRIB72) | 0.89 (0.05) | 5.57 (0.85) |
↵2-150 The ultrasound appearances have been treated as dichotomous (IVH grade 0, 1 or 2 vs grade 3 or 4) in the model reported for simplicity. The relation holds when the variable is treated as ordinal (IVH grade 0–4).