TABLE 3.

Five-y posttransplant c-statistics values (SE) for the iBOX at 1 year posttransplant in the derivation and validation datasets.

Dataset		n	c-statistic (SE) for full iBOX at 1 year	c-statistic (SE) for abbreviated iBOX at 1 year
Derivation	[7] derivation	1174	0.85 (0.02)	NA
Validation	Mayo Clinic Rochester	483	0.93 (0.03)	0.84 (0.05)
	Helsinki University Hospital	344	0.78 (0.06)	0.77 (0.06)
	BENEFIT RCT	416	0.70 (0.09)	0.70 (0.08)
	BENEFIT-EXT RCT	260	0.81 (0.07)	0.78 (0.06)

NA, not applicable; RCT, randomized controlled trial; SE, standard error.