TABLE 4.

Performance metrics of the final overall survival and cancer-specific survival models in predicting patient survival outcome within the imputed training cohort, the complete cases of the validation cohort, and the imputed validation cohort.

Performance	Training cohort (imputed)	Validation cohort (complete cases)	Validation cohort (imputed)
Overall survival
C-statistic	0.761 (0.745–0.777)	0.752 (0.717–0.787)	0.743 (0.706–0.779)
Calibration slope	1.017 (0.942–1.092)	1.005 (0.848–1.162)	0.959 (0.777–1.141)
3-year AUC	0.795 (0.773–0.817)	0.768 (0.718–0.818)	0.770 (0.718–0.821)
5-year AUC	0.810 (0.787–0.834)	0.771 (0.721–0.822)	0.767 (0.716–0.818)
Cancer-specific survival
C-statistic	0.775 (0.759–0.791)	0.758 (0.723–0.793)	0.755 (0.710–0.800)
Calibration slope	1.021 (0.931–1.111)	0.939 (0.769–1.109)	0.977 (0.755–1.199)
3-year AUC	0.797 (0.712–0.761)	0.786 (0.737–0.835)	0.757 (0.692–0.821)
5-year AUC	0.793 (0.771–0.816)	0.788 (0.737–0.839)	0.757 (0.691–0.823)

AUC, the area under the receiver operating characteristic curve. Numbers in parentheses are the bootstrapped 95% confidence interval.