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What's the baseline model when using coxph with factor variables?

Andreas Schlicker 
Hi all,

I'm trying to fit a Cox regression model with two factor variables but 
have some problems with the interpretation of the results. Considering 
the following model, where var1 and var2 can assume value 0 and 1:

coxph(Surv(time, cens) ~ factor(var1) * factor(var2),  data=temp)

What is the baseline model? Is that considering the whole population or 
the case when both var1 and var2 = 0?

Kind regards,
andi

Thread (5 messages)

Andreas Schlicker What's the baseline model when using coxph with factor variables? Dec 1 David Winsemius What's the baseline model when using coxph with factor variables? Dec 1 William Dunlap What's the baseline model when using coxph with factor variables? Dec 1 David Winsemius What's the baseline model when using coxph with factor variables? Dec 1 Andreas Schlicker What's the baseline model when using coxph with factor variables? Dec 2