Table 1 Clinical characteristics of study population
| Overall |
Gestational Age ≤ 28 weeks and Birth Weight ≤ 1000 g | |||
|---|---|---|---|---|
|
Case Group (n = 85) |
Control Group (n = 193) |
Case Group (n = 41) |
Control Group (n = 18) | |
| Female sex, N. (%) | 41 (48.2) | 87 (45.1) | 22 (53.7) | 8 (44.4) |
| Gestational Age, weeks | 27.6 (27.1 to 28.0) * | 30.1(29.7 to 30.4) | 25.9 (25.4 to 26.4) | 26.0 (25.1 to 26.9) |
| Birth weight, g | 1024 (952 to 1097) * | 1310 (1263 to 1358) | 754.1 (709.6 to 798.6) | 769.5 (681.2 to 875.8) |
| Twins, N. (%) | 23 (27.1) | 54 (28.0) | 8 (19.5) | 5 (27.8) |
| Cesarean Section, N. (%) | 69 (82.1) | 168 (88.4) | 27 (65.8) | 13 (72.2) |
| Antenatal steroids a, N. (%) | 49 (59.8) * | 139 (73.5) | 28 (68.3) | 12 (66.7) |
| Pregnancy-induced hypertension, N. (%) | 20 (26.3) | 46 (24.1) | 14 (34.1) * | 1 (5.5) |
| Alteration of doppler velocimetry of uterine arteries, N. (%) | 14 (19.4) | 35 (18.5) | 3 (7.3) | 3 (16.7) |
| pH on cord blood | 7.2 (7.2 to 7.3) * | 7.3 (7.2 to 7.3) | 7.2 (7.2 to 7.3) | 7.2 (7.2 to 7.3) |
| 5-min Apgar score | 7 (6 to 7) * | 8 (7 to 8) | 6.6 (6.1 to 7.1) | 7.1 (6.5 to 7.6) |