Dear Statalisters,

A seemingly simple question that I have not been able to resolve by searching old forum posts. I want to compare individual hazard ratios from non-nested survival models, an imaginary example:

Code:
stset time_to_death, failure(death)
stcox x1 z1 z2 z3
estimates store m1
stcox x2 z1 z2 z3
estimates store m2
insert_magical_command here m1_x1 = m2_x2
This would be relevant e.g. in comparing the predictive properties of two medical test or similar. Any suggestions?