TABLE 2.

Basic parameters of enhanced bootstrap in internal validation.

Parameters	1-year	3-years	5-years
C harrell apparent	0.7178	0.7178	0.7178
C time apparent	0.7678	0.7476	0.7352
Brier apparent	0.1396	0.2047	0.1396
C harrell optimism	0.0005	−0.0001	0.0010
C time optimism	0.0030	0.0032	0.0046
Brier optimism	0.0019	−0.0034	−0.0042
Optimism adjusted overall C statistics	0.7173	0.7179	0.7168
Optimism adjusted C statistics at time	0.7648	0.7444	0.7306
Optimism adjusted brier score	0.1414	0.2081	0.1437