Dear Statalisters,
I am examining whether a liver cirrhosis patient's galactose elimination
capacity predicts 1-year survival probability. My study includes around
1,000 patients. This is my first shot at creating a prediction model based
on logistic regression. I understand that it is advisable to draw a, say,
two-thirds sample and use this sample to estimate the parameters and then
test the model on the last third. Now, I have read that there is a way to
improve this method by doing it a number of times with random two-thirds. I
have searched for more information on this, but I simply don't know where to
start. Could somebody please tell me where to look (books, articles, Stata
commands)?
Thank you in advance.
Peter.
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