Risks of abnormal outcomes in categories of IVH relative to no IVH
| IVH 1 or 2 | IVH 3 or 4 | |||
| OR (95% CI) | P value | OR (95% CI) | P value | |
| IQ score <−2 SD | 0.78 (0.41 to 1.48) | 0.45 | 2.68 (1.21 to 5.94) | 0.01 |
| EF GEC ≥65 | 1.06 (0.60 to 1.87) | 0.84 | 1.17 (0.46. 2.97) | 0.75 |
| EF BRI ≥65 | 1.12 (0.64 to 1.95) | 0.69 | 1.76 (0.75 to 4.11) | 0.20 |
| EF MI ≥65 | 1.66 (0.98 to 2.82) | 0.06 | 1.73 (0.74 to 4.06) | 0.21 |
| Any academic skill <−2 SD | 0.70 (0.39 to 1.27) | 0.24 | 2.91 (1.35 to 6.27) | 0.006 |
| Reading <−2 SD | 0.85 (0.44 to 1.66) | 1.64 | 3.62 (1.59 to 8.24) | 0.002 |
| Spelling <−2 SD | 0.46 (0.16 to 1.29) | 0.14 | 4.48 (1.80 to 11.2) | 0.001 |
| Arithmetic <−2 SD | 0.61 (0.30 to 1.27) | 0.19 | 2.79 (1.20 to 6.48) | 0.017 |
| Motor dysfunction | 1.45 (0.93 to 2.26) | 0.11 | 4.45 (2.18 to 9.08) | <0.001 |
| Cerebral palsy | 2.24 (1.21 to 4.16) | 0.011 | 8.80 (4.03 to 19.2) | <0.001 |
| M-ABC | 1.38 (0.87 to 2.19) | 0.17 | 4.70 (2.21 to 9.97) | <0.001 |
BRI, Behavioural Regulation Index; EF, executive functioning; GEC, Global Executive Composite; IVH, intraventricular haemorrhage; MABC, Movement Assessment Battery for Children.; MI, Metacognition Index.