Positive predictive values (PPV) and likelihood ratios (LR) associated with model predicting severe disability at 2 years
| “Test” | Severe disability | No severe disability | PPV | LR (95% CI) |
|---|---|---|---|---|
| CRIB72 > 4 plus IVH grade 3 or 4 | 3 | 2 | 60% | 24.2 (4.4–133.3) |
| CRIB72 = 2–4 plus IVH grade 3 or 4 | 0 | 3 | 0% | 2.2 (0.12–41.2) |
| CRIB72 = 1 plus IVH grade 3 or 4 | 0 | 6 | 0% | 1.2 (0.07–20.3) |
| CRIB72 = 0 plus IVH grade 3 or 4 | 0 | 0 | ||
| CRIB72 > 4 plus IVH grade 0, 1 or 2 | 5 | 39 | 11% | 2.1 (1.0–4.4) |
| CRIB72 = 2 or 3 plus IVH grade 0, 1 or 2 | 3 | 71 | 4% | 0.70 (0.25–1.90) |
| CRIB72 = 1 plus IVH grade 0, 1 or 2 | 1 | 73 | 1% | 0.20 (0.03–1.50) |
| CRIB72 = 0 plus IVH grade 0, 1 or 2 | 2 | 32 | 6% | 1.00 (0.27–3.8) |