Hello!
I am using the coxph() function for counting process data. I want to include an intervening event as one of my covariates. In order to do this I have split the relevant observations in my data at the time of intervention. But I have not found any way to "inform" coxph() of the id of these observations. The result of this is that coxph() interprets the split data as extra observations, which is wrong.
Do anyone have a suggestion on how to specify the ID of subjects experiencing intervening events?
Or maybe other solutions on how to perform a cox regression including an intervening event covariate?
Thanks in advance!
-- Best regards, Vegard Andersen Institute of Community Medicine University of Tromso Tromso, Norway
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