Table 1. Study cohort characteristics.
| INFANTS | VB+AB (n = 21) | VB-AB (n = 24) | VF (n = 21) | CF (n = 24) | CB (n = 8) | |
| Male | 10 (48%) | 10 (42%) | 12 (57%) | 12 (50%) | 2 (25%) | |
| Mean gestational age | 40 wks, 2 days | 39 wks, 1 day | 39 wks, 5 days | 39 wks, 6 days | 39 wks, 6 days | |
| Birth weight in gram (SD) | 3768 (556) | 3423 (463) | 3381 (430) | 3995 (647) | 3597 (500) | |
| MOTHERS | Age in years (SD) | No maternal samples analysed | 32.6a (3,7) | 32.9 (4.8) | 32.3 (4.1) | No maternal samples analysed |
| Peripartum antibiotics (yes/no/unknown) | 4 / 16 / 1 | 3 / 8 / 13 | Missing data | Missing data | Missing data | |
| C-section indication (planned/emergency) | 15 / 9 | 4 / 4 |
AB: antibiotic treatment group; VB: no antibiotics, vaginally-born, breastfed; VF: no antibiotics, vaginally born, formula fed; CF: no antibiotics, caesarean-born, formula fed; CB: no antibiotics, caesarean-born, breastfed.
a data available for n = 23 mothers.