search for: daytomort

...would be easiest for me if I performed a responsible multiple comparisons test like TukeyHSD to see how each of the six Treatment:Group subgroups compared to each other. TukeyHSD does not appear to be defined for outputs from the function coxph -- (see survival library). cph <- coxph(Surv(DayToMort, Censor) ~ Treatment*Group, data=subb) --> Does anyone know of an implementation of TukeyHSD that would work, or of another post-hoc multiple comparison test? I believe that another responsible tack would be to clearly define the contrasts I'd like to make within the interaction term. Ho...