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From | Antoine Terracol <Antoine.Terracol@univ-paris1.fr> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: Cox regression, one observation |
Date | Thu, 13 Jun 2013 23:04:54 +0200 |
Hi Lee, what does -stset- report? Your setting should not be a problem, as illustrated below: clear input id t d x 1 1 1 1.5 2 1 0 0.75 3 1 0 2 3 3 1 2.5 end stset t, id(id) failure(d) list stcox x The fisrt 2 cases have one "month", while the second has 3 (and two rows) Antoine On 13/06/13 22:41, Lee Savage wrote:
I am running a survival analysis consisting of a dataset with 73 subjects. My duration time is months and three of my cases have durations of just one month meaning that their observed entry and exit is in the same row of the dataset. These cases are seemingly being excluded from the model as stset for the cases is _t=1 and _t0=0. My question is can I do anything to try and include these cases in the model or does survival analysis require that each case has at least two observations to be included? Thanks * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/
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