Table 1.
Patient characteristics
| Patient characteristics N = 588 | Pre-AOC implementation N = 293 | Post-AOC implementation N = 295 | P value* |
|---|---|---|---|
| Gestational age in weeks, mean (SD) | 27.8 (1.5) | 27.6 (1.6) | 0.12 |
| Birth weight in grams, mean (SD) | 1038 (292) | 1035 (260) | 0.88 |
| Small for gestational age, n (%) | 32 (10.9) | 21 (7.2) | 0.15 |
| Males, n (%) | 165 (56.3) | 155 (52.5) | 0.36 |
| Antenatal corticosteroids, n (%) | 250 (86.2) | 255 (87.3) | 0.69 |
| Caesarean delivery, n (%) | 145 (49.5) | 157 (53.2) | 0.37 |
| Multiple pregnancy, n (%) | 115 (39.2) | 99 (33.5) | 0.45 |
| of which monochorionic twins, n (%) | 71 (61.7) | 64 (64.6) | |
| Perinatal asphyxia, n (%) | 4 (1.4) | 8 (2.7) | 0.25 |
| Apgar score at 5 min, median (range) | 8 (2-10) | 8 (1-10) | 0.87 |
*Statistical analysis with independent T-test, χ2, or nonparametric Mann-Whitney U test as appropriate