Testing strata by covariate interactions in coxph
On Thu, 6 Oct 2005, Pyy-Martikainen Marjo wrote:
I specify a model with strata by covariate interactions. I would like to conduct a Wald test for the null hypothesis "no differences between any covariate effects in the 3 groups".
The "survey" package has a function regTermTest (which isn't specific to survey models -- it works on anything with vcov() and coef() methods). -thomas