Table 1.
Maternal/infant characteristics and delivery room interventions
| HOX N=110 |
LOX N= 89 |
P Value |
|
|---|---|---|---|
| Maternal | |||
| Age, y, mean ± SD | 27 ± 6 | 26 ± 5 | NS |
| Antenatal steroids, n (%) | 60 (54%) | 45 (51%) | NS |
| Maternal diabetes, n (%) | 15 (14%) | 14 (16%) | NS |
| Preeclampsia, n (%) | 28 (25%) | 26 (29%) | NS |
| Antenatal magnesium, n (%) | 39 (35%) | 50 (56%) | 0.04 |
| Prolonged rupture of membranes, n (%) | 22 (20%) | 18 (20%) | NS |
| Chorioamnionitis, n (%) | 9 (8%) | 7 (8%) | NS |
| Abruption, n (%) | 5 (4%) | 4 (4%) | NS |
| Placenta Previa, n (%) | 4 (3%) | 3(3%) | NS |
| Cesarean section, n (%) | 74 (67%) | 59 (66%) | NS |
| Infant | |||
| Male sex, n (%) | 58 (53%) | 43 (48%) | NS |
| Obstetric gestation age, wk, mean ± SD | 26 ± 1 | 26 ± 1 | NS |
| Birth weight, g, mean ± SD | 939 ± 255 | 983 ± 224 | NS |
| Intrauterine growth restriction, n (%) | 4 (4%) | 4 (4%) | NS |
| Multiple gestations, n (%) | 23 (21%) | 22 (25%) | NS |
| Arterial cord pH, mean ± SD | 7.23 ± 0.1 | 7.25 ± 0.1 | NS |
| Arterial cord base deficit, mEq/L, mean ± SD | 7 ± 5 | 6 ± 3 | NS |
| Delivery Room Interventions and Apgar scores | |||
| Initial FiO2 | 0.21 | 1.0 | |
| Final FiO2, median (Interquartile range) | 0.40 (0.30, 0.50) | 0.40 (0.30, 0.70) | NS |
| Oxygen Load (ΣFiO2 × Timemin), mean ± SD | 7.8 ± 2.8 | 5.2 ± 1.5 | < 0.01 |
| Positive pressure ventilation > 1 minute, n (%) | 85 (77%) | 79 (89%) | NS |
| Intubation in the delivery room, n (%) | 64 (58%) | 62 (70%) | NS |
| Chest compressions, n (%) | 1 (1%) | 2 (2%) | NS |
| Epinephrine, n (%) | 1 (1%) | 2 (2%) | NS |
| Apgar scores | |||
| 1 minute, median (Interquartile range) | 5 (3,7) | 5 (2,6) | NS |
| 5 minute, median (Interquartile range) | 7 (6,8) | 7 (6,8) | NS |