Table 5.

The AUROC for one-year mortality for the test cohort (2009–2011) using an artificial neural network model derived on the derivation cohort (1997–2008) with IMPACT features only (ANN I) and with IHTSA recipient features only (ANN II).

Time era	AUROC (95% CI)
	IMPACT	ANN I	P-Value	ANN II	P-Value
2009–2011	0.61 (0.58–0.63)	0.63 (0.60–0.65)	0.027	0.65 (0.63–0.68)	0.001

AUROC, area under the receiver-operating curve; CI, confidence interval; IHTSA, international heart transplantation survival algorithm; IMPACT, index for mortality prediction after cardiac transplantation.; P, probability that the result is the same as IMPACT.