Hello, I am just a beginner of R 1.9.0. I try to construct a predictive score for the development of liver cancer in cirrhotic patients. So dependant variable is binanry (cancer yes or no). Independant variables are biological data. The aim is to find out a cut-off value which differentiate (theoratically) from normal to pathological state for each biological data.
How can I step in procedue to get a cut-off value (threshold) for each variable? I think I should try by ROC. But I'm not sure. If so, someone can lead me? If not, someone can advice me how ? Any advice will be cordially aprreciated. Tin Tin Htar Myint Research assistant Liver unit Jean Verdier Hospital, Bondy France ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
