Gestation (weeks) | No NEC | NEC | OR (95% CI, P value) | |
24–26 | Exposed | 7 | 0 | 0.52 (0.03 to 9.13, 0.65) |
Not exposed | 1390 | 178 | ||
27–32 | Exposed | 10 | 3 | 7.98 (2.17 to 29.30, 0.002) |
Not exposed | 3991 | 150 | ||
33–36 | Exposed | 11 | 3 | 13.76 (3.77 to 50.23, <0.001) |
Not exposed | 4136 | 82 | ||
≥37 | Exposed | 19 | 1 | 9.56 (1.24 to 73.71, 0.03) |
Not exposed | 5449 | 30 | ||
Total | Exposed | 47* | 7 | 5.07 (2.27 to 11.27, <0.001) |
Not exposed | 14 966 | 440 |
*One patient from the current study had a gestational age of <24 weeks and is therefore not accounted for in the CNN data.
CNN, Canadian Neonatal Network; NEC, necrotising enterocolitis.