Final model for 5413 babies with full data on these variables, 1995–97
| Severe IVH | No severe IVH | |||
|---|---|---|---|---|
| Variable | Logistic regression coefficient† | n (% of 370) | n (% of 5043) | Adjusted OR (95% CI) |
| *Referent group; †intercept is −3.84. | ||||
| Ex utero transfer | ||||
| No 7 | 304 (82%) | 4594 (91%) | 1.0* | |
| Yes | 0.47 | 66 (18%) | 449 (9%) | 1.60 (1.15 to 2.21) |
| Antenatal corticosteroids | ||||
| None | 103 (28%) | 810 (16%) | 1.0* | |
| <24 hours | −0.31 | 89 (24%) | 1015 (20%) | 0.73 (0.53 to 1.01) |
| Complete and >7 days | −0.67 | 178 (48%) | 3218 (64%) | 0.51 (0.38 to 0.69) |
| 1 minute Apgar score | ||||
| ≥4 | 194 (52%) | 3999 (79%) | 1.0* | |
| <4 | 0.87 | 176 (48%) | 1044 (21%) | 2.39 (1.91 to 3.00) |
| Gestation in weeks | ||||
| 30 | 26 (7%) | 1274 (25%) | 1.0* | |
| 29 | 0.51 | 37 (10%) | 1066 (21% | 1.66 (0.99 to 2.76) |
| 28 | 1.02 | 50 (14%) | 840 (17%) | 2.76 (1.70 to 4.49) |
| 27 | 1.24 | 49 (13%) | 632 (13%) | 3.45 (2.11 to 5.63) |
| 26 | 1.63 | 69 (19%) | 583 (12%) | 5.10 (3.20 to 8.15) |
| 25 | 2.09 | 74 (20%) | 423 (8%) | 8.08 (5.06 to 12.90) |
| 24 | 2.41 | 65 (18%) | 225 (4%) | 11.14 (6.84 to 18.16) |
| Gender | ||||
| Female | 149 (40%) | 2352 (47%) | 1.0* | |
| Male | 0.22 | 221 (60%) | 2691 (53%) | 1.24 (0.99 to 1.55) |