Table 3 Baseline characteristics of the subgroups.
| Variable | No PVWM damage (n = 80) | PVWM damage (n = 21) | |||
|---|---|---|---|---|---|
| Controls (n = 23) | IVH 1 and 2 (n = 21) | IVH 3 (n = 36) | IVH 4 (n = 9) | PVL (n = 12) | |
| Gestational age (weeks) (median) | 28.0 | 28.0 | 27.5 | 27.0 | 27.5 |
| Body weight (g) (median) | 1100.0 | 980.0 | 1075.0 | 1060.0 | 1008.0 |
| Sex | No (%) | No (%) | No (%) | No (%) | No (%) |
| Male | 14 (61) | 12 (57) | 21 (58) | 2 (22) | 4 (33) |
| Female | 9 (39) | 9 (43) | 15 (42) | 7 (78) | 8 (67) |
| ROP | No (%) | No (%) | No (%) | No (%) | No (%) |
| No ROP | 19 (82) | 13 (62) | 28 (78) | 6 (67) | 5 (42) |
| Subthreshold ROP | 2 (9) | 3 (14) | 3 (8) | 2 (22) | 3 (25) |
| Threshold ROP | 2 (9) | 5 (24) | 5 (14) | 1 (11) | 4 (33) |
IVH, intraventricular haemorrhage; PVL, periventricular leucomalacia; ROP, retinopathy of prematurity.