| Variables | Proportion of study population |
|---|---|
| CDH(a) Side: Left Right | 77% 23% |
| Liver Position: Down Up | 31% 69% |
| O:E LHR(a) | 0.36 (0.28, 0.51) |
| Severe CDH(b) | 16% |
| Gender: Female Male | 51% 49% |
| Gestational Age (Weeks) | 38.9 (37.6, 39) |
| Birth Weight Percentile (%) Head Circumference Percentile (%) | 49 (30, 65) 51 (25, 74) |
| ECMO(a) Use | 39% |
| In-Hospital Mortality | 24% |
(a) Abbreviations: CDH, congenital diaphragmatic hernia; O:E LHR, observed-to-expected lung area to head circumference ratio on prenatal ultrasound; ECMO, extracorporeal membrane oxygenation. (b) Severe CDH defined as: Intrathoracic liver position and an observed-to-expected lung area to head circumference ratio on prenatal ultrasound less than 25%.