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| From | Celine Genty <Celine.Genty@imag.fr> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: Cox multilevel |
| Date | Tue, 16 Nov 2010 16:34:34 +0100 |
Hello,I am trying to make a multilevel model of survival data, so with the -shared()- option.
I have about 5000 patients included by 300 center.But 45 center have only 1 patient (with a median of 7 patients per center IQR 3-21).
Is multilevel model appropriate in this case ? Is there too much center ? Is there too much center with only 1 patient ?
Thank you very much. Best regards. Céline GENTY * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/