Table 3 Frequency of diagnostic failure in congenital heart disease with and without pulse oximetry screening.

Diagnostic methods	No.	Category of diagnostic failure	Cyanotic defects*		All comparable defects†
			No.	Frequency	No.	Frequency
Clinical follow‐up and routine examination1	300 102	Discharged undiagnosed	116	1:2587	351	1:855
		Discharged undiagnosed (normal routine examination)	82	1:3660	245	1:1224
		Death without diagnosis after routine examination	5‡		15*	1:20 006
		Death without diagnosis after discharge	2		11	1:25 008
Pulse oximetry screen, clinical follow‐up and routine examination¶	40 286	Discharged undiagnosed	2	1:20 143	8	1:5036
		Death without diagnosis after routine examination	0	0	0	0
		Death without diagnosis after discharge	0	0	0	0

*Transposition of great arteries, Tetralogy of Fallot, pulmonary atresia, hypoplastic left heart, total anomalous pulmonary venous return, common arterial trunk.

†Transposition of great arteries, Tetralogy of Fallot, pulmonary atresia, hypoplastic left heart, total anomalous pulmonary venous return, common arterial trunk, pulmonary stenosis, coarctation of aorta, aortic atresia or stenosis, interrupted aortic arch, atrioventricular septal defect.

‡Includes two newborns (hypoplastic left heart, coarctation of aorta) without exact data from routine examination.

¶References as in table 1 except for 17, 20.