Hi Dear all,
I am doing a new model in a derivation dataset using Cox model. Now I want to get Harrell's c-index and the goodness-of-fit test (Groennesby and Borgan test), and some criteria information (eg, AIC) in a validation dataset. How can I do that?
Based on the model from the derivation dataset, I can estimate the linear combination (xb) and the baseline survival (basesurv) for the validation dataset, But I don't know how to use them to proceed with the c-index, AIC and goodness-of-fit in the validation dataset. Since I am doing a validation, I cannot refit another Cox model..
If any help or suggestion, I will appreciate it very very much!!
Thanks again!!
mileo
I am doing a new model in a derivation dataset using Cox model. Now I want to get Harrell's c-index and the goodness-of-fit test (Groennesby and Borgan test), and some criteria information (eg, AIC) in a validation dataset. How can I do that?
Based on the model from the derivation dataset, I can estimate the linear combination (xb) and the baseline survival (basesurv) for the validation dataset, But I don't know how to use them to proceed with the c-index, AIC and goodness-of-fit in the validation dataset. Since I am doing a validation, I cannot refit another Cox model..
If any help or suggestion, I will appreciate it very very much!!
Thanks again!!
mileo
