| Parameter | Complicative | Control [Tröbs et al., 2014] |
| Number of children | 8 | 56 |
| Male:female | 8:0 | 4:1 |
| Gestational age [weeks] | 39 [37] 33 - 40 | 38 [38] 33 - 41 |
| Weight at birth [kg] | 3.1 [2.9] 1.7 - 4.0 | 3.2 [3.3] (2 - 4.4) |
| Age at operation [days] | 28 [31] 19 - 50 | 37 [39] 18 - 108 |
| Vomiting [days] | 4 [4] 1 - 6 | 4 [6] 1 - 28 |
| Body weight [kg] | 3.5 [3.4] 2.3 - 4.2 | 3.8 [4.0] 2.7 - 5.9 |