Dear R users?

 

I want to know how to use strata in survival analysis, I want to combine
multiple dataset:

 

Coxph(Surv(merged.time.v, merged.event.v)~merged.score+
strata(dataset.v))

 

So merged.time.v and merged.event.v are from multiple datasets.

How should I define dataset.v here?

 

Many thanks

 

yan

 

 


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