TABLE 1.
Cohort characteristics
| Variable | Preterm | Term | P |
|---|---|---|---|
| Stooled <48 h | 37 | 34 | |
| Male | 49% | 56% | 0.5580 |
| Black/African American | 78% | 91% | 0.1361 |
| Maternal age (yr) | 26.94 ± 6.00 | 25.15 ± 4.64 | 0.1731 |
| Gestational age (wk) | 27.51 ± 2.71 | 39 ± 1.15 | <0.0001 |
| Birthweight (g) | 874.1 ± 266.81 | 3115 ± 360.06 | <0.0001 |
| CRIB-II score | 10 (8:13) | 0 (0:0) | <0.0001 |
| Apgar score (5 min) | 6 (5:9) | 9 (9:9) | <0.0001 |
| Cesarean delivery (%) | 68 | 35 | 0.0058 |
| Prenatal antibiotics (%) | 32 | 38 | 0.5987 |
| Prenatal antibiotic doses (n)a | 1 (1:1.5) | 2 (1:2) | 0.2231 |
| Postnatal antibiotics (%) | 92 | 0 | <0.0001 |
| 16S rRNA positive (%) | 92 | 94 | 0.5397 |
| ITS rDNA positive (%) | 88 | 65 | 0.0224 |
Data is displayed as n ± sd or median (25% quartile: 75% quartile). aNumber of doses received prenatally in infants that received prenatal antibiotic doses.