Table 2

Clinical characteristics of the cohort. Data are n (%) or median (IQR), unless otherwise specified. Percentages are column-wise for totals and row-wise for subgroups

VariableTotal (n=70)
Sex
  Female33 (47%)
  Male37 (53%)
Delivery method
  Normal vaginal delivery27 (39%)
  Forceps vaginal delivery6 (9%)
  Ventouse vaginal delivery6 (9%)
  Emergency caesarean19 (27%)
  Elective caesarean12 (17%)
Induction of labour41 (59%)
Prenatal diagnosis68 (97%)
Outborn2 (3%)
Gestational age at birth (weeks)38.3 (37.4–38.7)
Gestational age at preoperative MRI (weeks)39.0 (38.4–39.7)
Age at scan (days)5 (2–7)
Birth weight (kg) (mean, SD)*2.94 (0.57)
Head circumference (cm)33.5 (32.2–34.5)
Apgar score
  1 min9 (7–9)
  5 min9 (9–10)
Cord arterial pH (mean, SD)*7.29 (0.082)
Prostaglandin E231 (44%)
Cardiac arrest0 (0%)
Days mechanical ventilation0 (0–1)
Balloon atrial septostomy13 (19%)
  Umbilical6 (46%)
  Femoral7 (54%)
Heart lesion
  Transposition of the great arteries28 (40%)
  Tetralogy of Fallot13 (19%)
  Coarctation of the aorta11 (16%)
  Pulmonary atresia5 (7%)
  Hypoplastic left heart syndrome4 (6%)
  Pulmonary stenosis3 (4%)
  Truncus arteriosus3 (4%)
  Tricuspid atresia2 (3%)
  Large VSD1 (1%)
  • *Normally distributed variables, summarised by mean and SD.