Hi All,
I'm running a competing risk regression model with subhazard ratios and I became stuck at the last step of the analysis. In essence, I am comparing survival for different racial/ethnic groups of transplant surgery candidates before and after a new surgical technique was implemented. Using -lincom-, I already figured out how to compare survival within an era of the surgical technique but now I would like to compare across surgical technique periods (pre. vs- post-implementation of the surgical technique). For the race variable, 1=white (reference group), 2=black, 3-Asian, 4=Hispanic. For event variable, 1==successful transplant and 2==death
stset survival_time, failure(event==1)
stcrreg i.race, compete(event==2)
stcrreg i.surgical_technique_era##i.race, compete(event==2)
Compare all races to white in pre-surgical technique implementation
lincom 2.race + 2.race#0.surgical_technique_era, shr
Now, how do I set up the lincom equation to compare survival between race groups across eras of surgical technique implementation? For instance, how do I compare survival for Asian patients pre- vs. post rather than just survival of Asian patients to white patients in one given era? Also, how would I compare survival for white patients in pre-era to survival of black patients in post-era?
Happy to clarify further if I made this unclear!
Thank you in advance!
Emile
I'm running a competing risk regression model with subhazard ratios and I became stuck at the last step of the analysis. In essence, I am comparing survival for different racial/ethnic groups of transplant surgery candidates before and after a new surgical technique was implemented. Using -lincom-, I already figured out how to compare survival within an era of the surgical technique but now I would like to compare across surgical technique periods (pre. vs- post-implementation of the surgical technique). For the race variable, 1=white (reference group), 2=black, 3-Asian, 4=Hispanic. For event variable, 1==successful transplant and 2==death
stset survival_time, failure(event==1)
stcrreg i.race, compete(event==2)
stcrreg i.surgical_technique_era##i.race, compete(event==2)
Compare all races to white in pre-surgical technique implementation
lincom 2.race + 2.race#0.surgical_technique_era, shr
Now, how do I set up the lincom equation to compare survival between race groups across eras of surgical technique implementation? For instance, how do I compare survival for Asian patients pre- vs. post rather than just survival of Asian patients to white patients in one given era? Also, how would I compare survival for white patients in pre-era to survival of black patients in post-era?
Happy to clarify further if I made this unclear!
Thank you in advance!
Emile
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