Table 1.
Clinical characteristics of the infant cohort.
| Extremely preterm (EP) (n = 29) | Very preterm 1 (VP1) (n = 25) | Very preterm 2 (VP2) (n = 8) | Full-term (FT) (n = 10) | |
|---|---|---|---|---|
| Birth weight (grams)a | 807 (675–945) | 1235 (1154–1322) | 1400 (1225–1538) | 3635 (3424–3752) |
| Gestational age (weeks)a | 26 (26–27) | 29 (28–30) | 30 (30–31) | 40 (40–41) |
| Caesarean section/vaginal delivery | 20/9 | 13/12 | 6/2 | 0/10 |
| Antibiotic exposure FWL (%) | 29 (100) | 25 (100) | None | None |
| Antibiotic exposure after FWL (%) | 21 (72) | 5 (20) | None | None |
| Narrow spectrum regimen after FWL (%) | 14 (48) | 3 (12) | None | None |
| Broad-spectrum regimen after FWL (%) | 8 (28) | 2 (8) | None | None |
| Total days of antibioticsa | 9 (5–13) | 4 (3–6) | None | None |
| Parenteral nutrition (days) | 29 | 12 | 1 | None |
| Total days of probiotic supplementationa | 46 (40–57) | None | None | None |
| Total days of parenteral nutritiona | 9 (6–13) | 6 (6–8) | 3 (3–3) | None |
| Total days of hospitalisationa | 80 (11–97) | 50 (36–70) | 38 (36–43) | 2 (1–3) |
a
Median and interquartile range, FWL = first week of life.