Table 1.
Demographics of infants included in the analysis (N = 333)
| Demographics | Number |
|---|---|
| Gestation | |
| Mean gestation at birth in days (SD) | 197 (16) |
| Median gestation at birth in days (IQR) | 198 (27) |
| Birth weight | |
| Mean birth weight in g (SD) | 1079.5 (340.8) |
| Median birth weight in g (IQR) | 1025 (525) |
| Gender | |
| Female (%) | 155 (46.5%) |
| Male (%) | 178 (54.5%) |
| Ethnicity | |
| White (%) | 130 (39.0%) |
| Mixed (%) | 44 (13.2%) |
| Asian (%) | 58 (17.4%) |
| Black (%) | 74 (22.2%) |
| Unknown (%) | 12 (3.6%) |
| Other (%) | 15 (4.5%) |
| Mode of delivery | |
| Vaginal delivery (%) | 137 (41.1%) |
| C-section (%) | 196 (58.9%) |
| Ventilation | |
| Mean number of days requiring mechanical ventilation prior to CPC or LS (SD) | 3.1 (8.2) |
| Median number of days requiring mechanical ventilation prior to CPC or LS (IQR) | 1 (2) |
| Mean number of days CPAP (air) prior to CPC or LS (SD) | 7.0 (8.7) |
| Median number of days CPAP (air) prior to CPC or LS (IQR) | 4 (10) |
| Mean number of days CPAP (oxygen) prior to CPC or LS (SD) | 9.3 (14.8) |
| Median number of days CPAP (oxygen) prior to CPC or LS (IQR) | 2 (12) |
| Feeding | |
| Mean number of days of donor breast milk prior to CPC or LS (SD) | 8.3 (8.9) |
| Median number of days of donor breast milk prior to CPC or LS (IQR) | 6 (8) |
| Mean number of days of maternal breast milk prior to CPC or LS (SD) | 23.0 (22.2) |
| Median number of days of maternal breast milk prior to CPC or LS (IQR) | 17 (25) |
| Mean number of days of formula prior to CPC or LS (SD) | 3.3 (9.0) |
| Median number of days of formula prior to CPC or LS (IQR) | 0 (2) |
| Mean number of days of breast feeding prior to CPC or LS (SD) | 3.4 (7.4) |
| Median number of days of breast feeding prior to CPC or LS (IQR) | 0 (3) |
| Antibiotic use | |
| Mean number of days of antibiotic use at birth (SD) | 2.4 (2.1) |
| Median number of days of antibiotic use at birth (IQR) | 2 (2) |
| Mean number of days of antibiotic use prior to CPC or LS (SD) | 5.1 (7.4) |
| Median number of days of antibiotic use prior to CPC or LS (IQR) | 3 (4) |
| C. perfringens colonisation | |
| Number colonised with C. perfringens (%) | 98 (29.4%) |
| Mean number of days prior to CPC (SD) | 27.1 (23.3) |
| Median number of days prior to CPC (IQR) | 21 (26) |
Abbreviations: CPC C. perfringens colonisation, LS Last sample, CPAP, Continuous positive airway pressure, SD Standard deviation, IQR Interquartile range