Table 2.

Accuracy of pulse oximetry screening in detection of CCHD.

Diagnostic accuracy	Pulse oximetry screening	CCHD
		CCHD present	CCHD absent
	Screen positive	3	13
	Screen negative	1	1838
Sensitivity	TP TP + FN	75% (95% CI: 28.91% to 96.59%)
Specificity	TN FP + TN	99.29% (95% CI: 98.79% to 99.60%)
Positive Predictive Value	TP TP + FP	18.75% (95% CI: 5.80% to 43.80%)
Negative Predictive Value	TN FN + TN	99.94% (95% CI: 99.66% to 99.99%)

CCHD: Critical congenital heart disease; TP: True Positive; FP: False Positive; TN: True Negative; FN: False Negative.