Table 1. Distribution of the different types of CHD included in the study population.

CHD group	n	CHD type		n	GA at measurement$	% of study population
Overall	127	All			23.2 ± 3.2	100
Septal defects	25				23.28 ± 3.2	19.7
		VSD		16	23.4 ± 3.5	12.6
		AVSD		9	23.1 ± 2.7	7.1
Conotruncal anomalies	54				23.2 ± 3.6	42.5
		TGA (IVS and VSD)		27	23.6 ± 3.2	21.3
			TGA + IVS	19	24.1 ± 3.2	15.0
			TGA + VSD	8	21.7 [20.2–23.5]	6.3
		TOF		16	23.2 ± 2.9	12.6
		VSD + pulmonary atresia		2	20.7; 23.1	1.6
		DORV + pulmonary stenosis		2	19.4; 21.3	1.6
		TGA + VSD + pulmonary stenosis		2	19.9; 24.3	1.6
		Truncus arteriosus		1	22.1	1.0
		ccTGA		2	26.0; 28.3	1.6
		DORV, no PS		2	20.4; 20.6	1.6
Single ventricle	10				20.6 [20.0–24.0]
		Hypoplastic right heart syndrome		5	20.4 [19.9–21.9]	3.9
		Hypoplastic left heart syndrome		5	23.1 ± 4.8	3.9
Complex	15				20.9 [20.1–21.7]
		AVSD combined with other cardiac anomalies		3	20.8 ± 4.0	2.4
		DILV		4	20.5 ± 0.6	3.1
		Ebstein anomaly		5	20.7 [20.4–27.0]	3.9
		Other		3	21.0; 21.1; 23.7	2.4
Miscellaneous	5				25.8 ± 2.4	3.9
R/L disproportion	9				26.2 ± 2.9
		Aortic coarctation		8	25.9 ± 3.0	6.3
		No aortic coarctation		1	28.3	1.0
Vascular ring	6				21.9 ± 1.5	4.7
Chromosomal aberration		Noonan syndrome		3	19.4; 21.0; 28.0	2.4

^$ Data provided are percentages or mean ± SD. Median [interquartile range] are provided for variables that are not normally distributed, Individual values are shown when n was low.

Abbreviations: AVSD = atrioventricular septal defect, ccTGA = congenitally corrected transposition of the great arteries (double discordance), CHD = congenital heart disease, DILV = double inlet left ventricle, DORV = double outlet right ventricle, IVS = intact ventricular septum, TGA = transposition of the great arteries, TOF = tetralogy of Fallot, VSD = ventricular septal defect.