Hi all,
what is the reason why the anova() method for coxph objects does not work when
robust standard errors have been requested, e.g.,
fit - coxph(Surv(futime, fustat) ~ resid.ds *rx + ecog.ps, data = ovarian,
robust = T)
anova(fit)
any pointers will be much appreciated.
Sincerely,
Mura
Dear All,
I have a question regarding the output of survfit() when I supply a Cox model.
Lets say for example:
library(survival)
fit - coxph(Surv(time, status == 2) ~ factor(spiders), data = pbc)
fit # HR for spiders is significant
newdata - data.frame(spiders = factor(0:1))
sf -
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