Dear respected member,
during the analysis of multi stage analysis through r code:
two questions: one ,if the ridge function is appropriate and second one how to decide the theta value...)
mcph <-
coxph(
Surv(Tstart, Tstop, outc == levels(v$outc)[j]) ~
ridge( wnd_age_s, female, dm, wnd_cat1, wnd_cat2, wnd_cat3, wnd_cat4, theta = 5),
Thanks,
Manoj
University of Pittsburgh