I am trying to fit a propensity score weighted cox regression model in R. However, one of the treatment groups has zero events, so I also need to use an adjustment method (Firth's penalized likelihood).
I have been using the coxphf package just fine to run unweighted models, but there is not an argument that allows for the inclusion of weights in the same was that the regular coxph function allows. Any guidance would be much appreciated.
