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...shown below. This is basically an extension of the Cox model for interval censored data. My dataset, bdat5 can be found here: https://drive.google.com/open?id=1sQSBEe1uBzh_gYbcj4P5Kuephvalc3gh cfitcp2 <- coxph(Surv(start,stop,status)~sex+rels+factor(treat)+log(age)+log(tcrate3+0.01)+cluster(trialno)+strata(enum),data=bdat5,model=TRUE,x=TRUE,y=TRUE) I would now like to use the model to predict the probability of zero events by two years - this is equivalent to the survival probability at 2 years I believe. This is so that I can compare the output to similar estimates obtained from negative b...

Hi Everyone, I have data in a long format e.g. there is one row per patient but each follow-up appointment is included in the row. So, a snippet of the data looks like this: TrialNo Drug Sex Rand Adate1 Date1 Dose1 Time1 Adate2 Date2 Dose2 Time2 B1001029 LTG M 15719 30/04/2003 15825 150 106 29/08/2003 15946 200 227 B1117003 LTG M 15734 30/04/2003 15825 200 91 03/09/2003 15951 250 217 B138015 LTG M 14923 06/02/2001 15012 225 89 08/05/2001 15103 300 180 B112003 TPM F 14914 15/...