Table 2.

Predictive performance of the rebleeding event prediction following endoscopic treatment model

	C-index	AUC (95%CI)	Brier (95%CI)
The derivation cohort
6 weeks	85.7	0.856 (0.794-0.918)	0.062 (0.042-0.083)
1 year	77.5	0.796 (0.737-0.855)	0.143 (0.121-0.165)
2 years	74.1	0.790 (0.727-0.853)	0.177 (0.149-0.205)
Internal validation
6 weeks	84.2	0.841 (0.755-0.925)	0.066 (0.036-0.102)
1 year	75.9	0.783 (0.712-0.842)	0.153 (0.127-0.185)
2 years	73.5	0.779 (0.685-0.867)	0.184 (0.146-0.233)
External validation
6 weeks	88.5	0.803 (0.647-0.959)	0.04 (0.014-0.066)
1 year	86.2	0.868 (0.808-0.928)	0.127 (0.096-0.159)
2 years	76.8	0.733 (0.634-0.832)	0.194 (0.151-0.237)

C-index: Concordance index; AUC: Area under the receiver operating curve; CI: Confidence interval.