Hello,
I've stset survival data, and received these messages:
" 12 multiple records at same instant PROBABLE ERROR
(risktime[_n-1]==risktime)
22 obs. begin on or after (first) failure?"
I'd like to ask for help in understanding what is meant by "same instant".
And, since subjects were recruited over several years' time, I'm not
sure why it would be a problem if observations begin on or after
(first) failure.
--
Best wishes,
Michael McCulloch
Pine Street Foundation
124 Pine St., San Anselmo, CA 94960-2674
Tel: (415) 407-1357
Fax: (415) 485-1065
[email protected]
www.pinestreetfoundation.org
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