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?
No.
The Cox model assesses the risk associated with each covariate by comparing, at each event
time, the values of the subject who had the event to all those who were also present at
that time. You can't compare to missing.
Terry T.
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