Table 3.

Sensitivity, Specificity, and Hazard Ratio of original data and following 10-fold Cross-Validation and Bootstrapping.

Sensitivity/Specificity (cut-off=0.5)
Original Data with logistic regression
Sensitivity	0.793
Specificity	0.858

1000 times of 10 fold Cross-Validation data sets with logistic regression
Variable	N	Mean	Std Dev	Minimum	Maximum
Sensitivity	1000	0.789	0.0067	0.758	0.793
Specificity	1000	0.859	0.0021	0.858	0.870

Hazard Ratio
Original Data
1.313

1000 fold Bootstrapping
N	Mean	Std Dev	Minimum	Maximum
1000	1.314	0.017	1.269	1.372