Baseline demographic data
| Closed loop (n=10) | Control (n=10) | |
| Gestational age at birth (week) | 27.0 (2.4) | 27.5 (2.8) |
| Birth weight (g) | 962 (164) | 823 (282) |
| Sex (male:female) | 5:5 | 5:5 |
| Antenatal variables | ||
| Antenatal steroids | 10 (100%) | 9 (90%) |
| Maternal smoking | 1 (10%) | 2 (20%) |
| Chorioamnionitis | 2 (20%) | 3 (30%) |
| PROM | 4 (40%) | 4 (40%) |
| Hypertension | 1 (10%) | 1 (10%) |
Data are presented as mean (SD).
PROM, prolonged rupture of membranes (>24 hours).