Neonatal and maternal characteristics of full cohort by gestational week
| Neonatal characteristics | 22–24 (n=222) | 22 (n=44) | 23 (n=87) | 24 (n=91) | P value |
| Birth weight | 597 (111) | 492* (62) | 577 (83) | 666 (106) | <0.01†‡§ |
| Male | 117 (53) | 23 (52) | 45 (52) | 49 (54) | ns |
| Outborn | 32 (14) | 3 (7) | 13 (15) | 16 (18) | ns |
| Maternal characteristics | 22–24 (n=193) | 22 (n=37) | 23 (n=77) | 24 (n=79) | P value |
| Multiple gestation | 32 (17) | 8 (22) | 9 (12) | 15 (19) | ns |
| Caesarean section | 70 (36) | 0 (0) | 22 (29) | 48 (61) | <0.01†‡§ |
| Antenatal steroids Complete course | 184 (95) 122 (63) | 37 (100) 20 (54) | 73 (95) 51 (66) | 74 (94) 51 (65) | ns ns |
| Tocolysis | 142 (74) | 35 (95) | 56 (73) | 51 (65) | ns§ <0.01† ‡ |
| Preeclampsia | 14 (7) | 1 (3) | 4 (5) | 9 (11) | ns |
Data presented as mean (SD) or n (%).
*Birthweight not recorded, n=1.
†Week 22 vs 23.
‡Week 22 vs 24.
§Week 23 vs 24.