I am using the coxph() function (from the 'survival' package) for a data
set that requires one of the covariates to be treated as time-dependent.
The issue is with this data set is there are some covariate values that are
missing at the time point when the event occurs.
For example:
Person A:
Day time-dependent covariate deathday status
1 34 6
0
2 47 6
0
3 78 6
0
4 29 6
0
5 NA 6
0
6 NA 6
1
R throws out this event due to the missing time-dependent covariate at day
6. Is there a way I can keep this event without filling in a covariate
value at day 6?
-Phil
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