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| From | Maarten Buis <maartenlbuis@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: stcox in case the ph-assumption is rejected |
| Date | Fri, 6 Jan 2012 16:13:07 +0100 |
On Fri, Jan 6, 2012 at 3:24 PM, Yuval Arbel wrote: > My intentions are only to supplement a footnote and present the > HP-assumption tests in an appendix and not to go further beyond that. You should go further than that as you showed that the proportional hazard assumption was rejected for at least three variables. So you now must fix your model. It makes no sense to show that your model is flawed and than do nothing about it. Allowing the effects of those variables to change over time or stratify on them are two options. Since your variables are continuous I would prefer to let the effects change over time. Hope this helps, Maarten -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/