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st: stcrreg: startifications and median survival?


From   Wei Xun <weiwxun@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: stcrreg: startifications and median survival?
Date   Wed, 14 Oct 2009 10:00:16 +0100

Dear Statalister:

I apologise if this has been asked before but my search in the
archives did not return any relevant results.

I am currently trying to estimating the effects of certain exposures
on mortality from specific cancers where a large proportion of deaths
occur from other causes. The new command stcrreg in STATA 11 has been
most useful.

However, I noticed that unlike stcox, stcrreg does not allow any
stratification terms within the model. Are there any particular
reasons why this not possible? I am aware of the fact that the power
will be significantly reduced.

Also my second problem is that I also would like to calculate the
median survival time after the adjustment for competing causes. The
stci command which works with stcox does  not extent to stcrreg. Could
I alternatively use stcompt to calculate the cumulative incidence
curve and estimate it from the point of 50%?

Thank you in advance.

Kind regards

Wei Xun
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