Table 2.

Construct Discriminant Validity across Grading Assumptions

	ISHLT		Revised		Berlin-Type
	AUC	P Value	AUC	P Value	AUC	P Value
Timing
0–72 h	0.685	—	0.679	—	0.708	—
48–72 h	0.755	0.002	0.744	0.008	0.749	0.103
Ventilator status
Ventilation	0.755	—	0.744	—	0.749	—
No ventilation	0.747	0.770	0.743	0.941	0.751	0.727
Transplant type
Single-lung Tx	0.841	—	0.814	—	0.811	—
Bilateral-lung Tx	0.717	0.118	0.713	0.261	0.720	0.319

Definition of abbreviations: AUC = area under the curve; ISHLT = International Society for Heart and Lung Transplantation; Tx = transplant.

Comparisons of significance within definitions are listed directly to the right of the AUC. There were no significant differences in discriminant ability between definitions for each assumption. Note: single and bilateral cohorts are abstracted from the 48- to 72-hour interval definitions, and the significance is determined using a chi-square test of the receiver operating characteristic curves comparing single to bilateral.