Table 2. Final Stage 1 screening outcomes by potential exclusion criteria, evaluation of critical congenital heart defects (CCHD) screening in the neonatal intensive care unit, February to September 2015 (N=3423).

	On oxygen N=579						Not on oxygen N=2844
		Total pass	Pass	Conditional passa	Failb		Pass	Failb
	N	%	%	%	%	N	%	%
Total infants screened at Stage 1	579	97.9	74.1	23.8	2.1	2844	99.3	0.7
Prenatal CHD diagnosis and/or echo before screen	92	95.7	68.5	27.2	4.3	157	95.5	4.5
Neither prenatal diagnosis nor echo before screen	487	98.4	75.2	23.2	1.6	2687	99.5	0.5
Gestational age (weeks)
<28	85	97.6	56.5	41.2	2.4	21	90.5	9.5
28–31	121	99.2	74.4	24.8	0.8	123	100.0	–
32–36	205	99.0	74.6	24.4	1.0	1124	99.8	0.2
⩾37	168	95.8	82.1	13.7	4.2	1576	98.4	1.0
Birth weight (g)
<1000	79	97.5	64.6	32.9	2.5	27	92.6	7.4
1000–1499	102	100.0	67.6	32.4	—	106	100.0	–
1500–2499	178	98.9	75.3	23.6	1.1	907	100.0	–
⩾2500	220	96.4	79.5	16.8	3.6	1804	99.0	1.0

^aInfants on supplemental oxygen were deemed conditional passes if saturations <95%, yet differential <4% and saturations were consistent with clinical profile. Rescreening only performed as per the modified arm of the algorithm. Percentage is of all infants on oxygen who passed the screen.

^bFail as per the New Jersey-recommended algorithm.