How could this be done? My understanding is that chi-squared test is a global test, like the log-rank test; My take is that authors have done a 2x2 contingency table and obtained a p-value, but can you then extrapolate from this a comparison of hazard ratios? I did not think so because this is missing the time-to-event component.
I've come across the same situation where I would like to compare HRs from two cox models. Except p value, I am also thinking of 95% CI. I did a lot of research but still don't know what to do. I am wondering if you have figured out?
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