Table 2.
Baseline characteristics of study participants (n=4910)
| Variable | Entire Cohort (N=4910) |
Neonatal Composite Morbidity (n=56) |
No Neonatal Composite Morbidity (n=4,854) |
P |
|---|---|---|---|---|
| Maternal age, years, mean (sd) | 26.0 (6.0) | 26.0 (7.1) | 26.0 (5.9) | 0.97 |
| Race, n(%) | ||||
| African-American | 3201 (65.2) | 41 (73.2) | 3160 (65.1) | 0.44 |
| Caucasian | 1038 (21.1) | 9 (16.1) | 1029 (21.2) | |
| Hispanic | 401 (8.2) | 5 (8.9) | 396 (8.2) | |
| Other | 270 (5.5) | 1 (1.8) | 32 (7.3) | |
| Body mass index, Kg/m2, mean (sd) | 32.0 (7.3) | 33.9 (7.8) | 32.0 (7.3) | |
| Epidural, n (%) | 4369 (89.0) | 48 (85.7) | 4321 (89.0) | 0.43 |
| Primiparous, n (%) | 1635 (33.3) | 24 (42.9) | 1611 (33.2) | 0.13 |
| Smoking, n(%) | 694 (14.1) | 9 (16.1) | 685 (14.1) | 0.68 |
| Alcohol, n(%) | 52 (1.1) | 2 (3.6) | 50 (1.0) | 0.07 |
| Chronic hypertension, n(%) | 199 (6.8) | 5 (11.1) | 194 (6.7) | 0.24 |
| Diabetes, n(%) | 170 (5.8) | 5 (11.1) | 165 (5.7) | 0.12 |
| Mode of delivery, n (%) | ||||
| Spontaneous vaginal | 3800 (77.4) | 25 (44.6) | 3775 (77.8) | <0.01 |
| Operative vaginal | 271 (6.5) | 4 (7.1) | 267 (5.5) | |
| Cesarean | 839 (17.1) | 27 (48.2) | 812 (16.7) | |
| Gestational age, weeks, mean (sd) | 38.9 (1.2) | 38.8 (1.3) | 38.9 (1.2) | 0.66 |
| Birth weight, grams, mean (sd) | 3241 (462) | 3218 (515) | 3242 (461) | 0.70 |
| Small for gestational age, n(%) | 628 (12.8) | 12 (21.4) | 616 (12.7) | 0.05 |
| Male infant, n (%) | 2579 (12.8) | 33 (58.9) | 2546 (52.5) | 0.34 |
n (%), number and percentage of subjects having a given categorical characteristic.