Table 1.
Baseline characteristics of study subjects
| Respiratory Morbidity (n=175) |
No Respiratory Morbidity (n=4561) |
p | |
|---|---|---|---|
| Maternal age (years), mean (SD) | 24.9 (6.4) | 25.6 (5.9) | 0.13 |
| Advance maternal age | 5.7% | 8.5% | 0.19 |
| Gestational age at delivery (weeks), mean (SD) | 38.9 (1.3) | 38.9 (1.2) | 0.55 |
| Maternal black race | 66.3% | 65.0% | 0.72 |
| Body mass index (BMI), mean (SD) | 33.0 (7.1) | 31.9 (7.3) | 0.05 |
| Preeclampsia | 16.0% | 9.4% | <0.01 |
| Gestational diabetes | 3.4% | 2.7% | 0.48 |
| Pregestational diabetes | 4.0% | 0.9% | <0.01 |
| Nulliparous | 57.4% | 40.2% | <0.01 |
| Prior cesarean | 16.0% | 8.4% | <0.01 |
| Labor type Spontaneous Augmented Induction |
25.1% 24.6% 50.3% |
30.0% 26.8% 43.2% |
0.16 |
| Regional anesthesia | 89.1% | 89.5% | 0.90 |
| Prostaglandin | 24.0% | 17.2% | 0.02 |
| Foley bulb | 12.0% | 9.1% | 0.18 |
| Oxytocin | 66.9% | 65.9% | 0.79 |
| Birth weight (g), mean (SD) | 3260 (548) | 3238 (453) | 0.53 |
| Birth weight > 4000g | 6.3% | 5.0% | 0.48 |
| Vaginal delivery | 50.3% | 80.1% | <0.01 |
| Operative vaginal delivery | 6.9% | 5.3% | 0.39 |
| Cesarean | 42.9% | 14.6% | <0.01 |
| Maternal fever | 16.6% | 1.3% | <0.01 |
SD Standard deviation