Table 1.
Characteristics of mothers and children by prenatal antibiotics and mode of delivery: the Mothers and Newborns Study in Northern Manhattan and South Bronx
| 2nd or 3rd trimester antibiotics |
Delivery mode |
||||
|---|---|---|---|---|---|
| Variables | Total sample, n = 436 (%) | No, n = 366 (%) | Yes, n = 70 (%) | Vaginal, n = 337 (%) | C-section, n = 99 (%) |
| Children | |||||
| Boys | 47.5 | 48.9 | 40.0 | 50.1 | 38.4 |
| Dominican | 39.7 | 38.0 | 48.6 | 42.4 | 30.3 |
| 2nd or 3rd trimester antibiotics | 16.1 | — | — | 15.7 | 17.2 |
| C-section | 22.7 | 22.4 | 24.3 | — | — |
| Gestational age, weeks, mean (s.d.) | 39.5 (1.2) | 39.5 (1.2) | 39.3 (1.1) | 39.5 (1.2) | 39.4 (1.1) |
| Birth weight, g, mean (s.d.) | 3418.5 (473.4) | 3429.9 (481.3) | 3358.6 (428.0) | 3411.9 (471.3) | 3441.0 (482.4) |
| Ever breastfed | 74.7 | 74.7 | 74.3 | 74.6 | 74.7 |
| Mothers | |||||
| Age of mother at birth (years) | |||||
| Mean (s.d.) | 25.5 (4.9) | 25.5 (4.9) | 25.2 (4.9) | 25.2 (4.8) | 26.3 (5.1) |
| Previous births | |||||
| 0 | 24.8 | 24.7 | 25.7 | 23.2 | 30.3 |
| 40 | 75.2 | 75.3 | 74.3 | 76.8 | 69.7 |
| Education level of mother at birth | |||||
| <High school | 37.6 | 39.1 | 30.0 | 38.3 | 35.4 |
| ≥ High school | 62.4 | 60.0 | 70.0 | 61.7 | 64.7 |
| Public assistance in pregnancy | 57.3 | 57.1 | 59.0 | 57.3 | 57.6 |
| Pre-gravid BMI, kg m2, mean (s.d.) | 25.8 (6.0) | 25.8 (6.0) | 26.0 (6.0) | 25.6 (5.9) | 26.4 (6.2) |
Abbreviation: BMI, body mass index.