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st: RE: str2ph and cluster

From   "Nick Cox" <>
To   <>
Subject   st: RE: str2ph and cluster
Date   Thu, 13 Jul 2006 13:10:32 +0100

Run the program with and without using this option previously
to  see whether it makes any difference. 

On my understanding, "valid" is not necessarily the 
best word here. -str2ph- is just a way of putting 
a number on agreement between observed and predicted, 
using a likelihood approach. That can be useful, 
but it is not totemic. 


Jane Skinner
> I have a question about Patrick Royston's str2ph command to
> calculate explained variation in survival analysis, which I am using
> with stcox.
> Are the results of str2ph still valid if the "cluster" option is
> used to adjust standard errors for intragroup correlation?

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