# Survival analysis with cluster data

I am performing a survival analysis with cluster data cluster(id) using GEE in R (package:survival).

I was wondering I could correctly interpret the Robust value in the summary of the model output.

Robust = 14.65 p=0.4

For a robust model involving a cluster term, this is reported as an overall test of model significance along with the Likelihood ratio, Wald, and Score (log-rank) tests. It can be hard to find specific documentation on the Robust term, but its meaning is clear from the underlying code for survival:::print.summary.coxph and survival:::summary.coxph.