Hi, I would like to compare the hazard functions of two samples using the Cox proportional hazards model. For sample 1 I have individual time-to-event data. For sample 2 I don't have individual data, but grouped data that allows to obtain a hazard function.
I am wondering if there is an R function that allows to obtain a hazard ratio of the two hazard funtions (under the proportionality assumption) taking into account the censoring of the data? I am aware of survexp and survdiff functions, but I am not sure if that is the best way to do what I need. Any help will be highly appreciated. Montse Rue Department of Basic Medical Sciences University of Lleida (Spain) P.S. I sent this message yesterday, but I think I did something wrong and it did not arrive to the list. I apologize if I sent it twice. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
