Table 1.

Patient characteristics (n = 243)

Sex
Boy (%)	118 (48.6)
Girl (%)	125 (51.4)
Gestational age (weeks, median with min–max)a	39.0 (29–42)
Birth weight (g, mean with SD)b	3 141 (±778)
Weight at operation (g, median with min–max)	6 000 (2100–102,000)
Age at operation (days, median with min–max)	168 (17–6898)
Age groups
≤ 6 months (%)	128 (52.7)
>6 months (%)	115 (47.3)
Genetic syndrome
Trisomy 21 (%)	31 (12.8)
22q11 (%)	3 (1.2)
Other (%)	10 (4.1)
Concomitant cardiac defects
Patent foramen ovale (%)	55 (22.6)
Atrial septal defect (%)	53 (21.8)
Patent ductus arteriosus (%)	30 (12.3)
Pulmonary valve stenosis (%)	18 (7.4)
Follow-up duration (years, median with min–max)	3.1 (0.3–9.1)

SD standard deviation

^a n = 227, from 16 patients gestational age was unknown

^b n = 228, from 15 patients birth weight was unknown