Programming the statistical procedures from SAS

Overlapping cohort in time eras in cox analysis

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New Contributor
Posts: 2

Overlapping cohort in time eras in cox analysis

HI, I have come across an issue regarding overlapping cohorts two time-dependent eras.

 

I want to see if a specific time period (Era 1 vs Era 2) has affected patients waiting on a list for heart transplant.

 

However, the patients in Era 1 overlap into Era 2. I do not want to exclude the patients who overlap into Era 2. 

 

Is there way that SAS to do a multivariate cox regression analysis that will allow for these overlapping cohorts when looking at the effect of an Era (Era 1 vs Era 2).

Respected Advisor
Posts: 4,606

Re: Overlapping cohort in time eras in cox analysis

Did an abrupt change occur between Era1 and Era2?

 

You could censor overlapping patients at the end of Era1.

PG
New Contributor
Posts: 2

Re: Overlapping cohort in time eras in cox analysis

Is there a way that I can conduct the analysis without censoring the overlap. I hope to include the overlapped patients.

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