Hi all I would like to do some survival analysis using the survival package. The most difficult part for me is setting up the censoring data correctly and I would appreciated if someone can help confirm if I'm doing this correctly. According to the ?Surv function.
"For interval censored data, the status indicator is 0=right censored, 1=event at time" how I interpret this is:
1=death before event, 0= lost of follow-up or alive AFTER time to event
I'm interested in Overall survival - time to event is 60 months. Below is my dataframe with some data and what I think censoring should be for the given row. lastseen is basically the highest data including followup and recurrence that was reported for that particular subject. death.month sometimes is unavailable, thus denoted as NA. Can someone confirm if my censor code is correct?
death.month lastseen OS.censor OS.month 34 9.034166 9.0341656 1 9.0341656 35 NA 2.0367937 0 2.0367937 36 NA 0.4599212 0 0.4599212 39 NA 8.6727989 0 8.6727989 40 NA 97.6675427 0 97.6675427 41 120.6964520 120.6964520 0 120.6964520 42 37.680683 37.6806833 1 37.6806833 43 49.014455 49.0144547 1 49.0144547
thank you!