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st: C-statistic in Cox models with late entry


From   Tasha Amin <[email protected]>
To   Stata list <[email protected]>
Subject   st: C-statistic in Cox models with late entry
Date   Wed, 25 Sep 2013 00:21:11 -0400

This question was posted before in 2010 by someone else but remains unanswered. 

Is there a way to obtain Harrell's C after -stcox- in a dataset that has late entry, i.e. left truncation?

I would like to compare C-statistics from various nested Cox models but when I type
-estat concordance- in Stata 12, I get the following message 

"estat concordance may not be used with late entry or time-varying data"

The data has to remain -stset- as is, with late entry. Any help would be appreciated.

Thanks,
Tasha Amin
PhD Candidate (Epidemiology) 		 	   		  
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