This message is for those familiar with the survey package. I need to fit a weighted Cox model to accommodate the sampling weights as I have a case-control study with controls sampled at random from a database in a ratio 2:1 to cases (whom were all sampled). I want to make sure I am using the right svydesign syntax to specify this sampling design. Can anyone please check if the statement below is appropriate for my design?
#group represents the case (total of 132) vs control (253 out of the total of 853 controls) groups; prob is 1 for cases and 253/853 for controls and ssize=132 for cases and 853 otherwise; dstr=svydesign(id=~1, strata=~group, prob=~prob, fpc=~ssize, data=noNA) -- View this message in context: http://r.789695.n4.nabble.com/svydesign-syntax-tp2298793p2298793.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
