Table 1. Demographics and clinical details of case-control cohort.
NA, not applicable; DOL, day of life; NPO: non per os, no oral nutrition.
| Cases | Controls | |
|---|---|---|
| Participants | 19 | 37 |
| Stools | 210 | 252 |
| Number of stools per participant before BSI (25th–75th quartile) | 4 (3–6) | 4 (2–4) |
| Number of stools per participant after BSI (25th–75th quartile) | 6 (3–8) | 3 (3–4) |
| Bacteremia DOL (25th–75th quartile) or matched DOL for controls | 32 (20–44) | 32 (19–46) |
| Antibiotic days before bacteremia or matched control DOL (25th–75th quartile) | 16 (7–25) | 21 (9–28) |
| Overall antibiotic score from birth to BSI or matched control DOL (25th–75th quartile) | 53 (26–112) | 57 (25–85) |
| Gestational age (25th–75th quartile) | 25 (24–27) | 25 (25–26) |
| Birthweight, g (25th–75th quartile) | 740 (620–833) | 810 (676–880) |
| % Female | 68 | 68 |
| % Cesarean | 84 | 84 |
| % First 8 weeks NPO | 26 | 20 |
| % First 8 weeks human milk | 47 | 55 |
| % First 8 weeks donor milk | 6 | 7 |
| % First 8 weeks formula | 21 | 18 |
| Bloodstream infection | 19 | NA |
| Staphylococcus aureus infection | 6 | NA |
| Streptococcus agalactiae | 3 | NA |
| Enterococcus faecalis | 2 | NA |
| Serratia marcescens | 3 | NA |
| Escherichia coli | 2 | NA |
| Klebsiella pneumoniae | 2 | NA |
| Enterobacter cloacae | 1 | NA |