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RE: st: survival analysis


From   Cameron McIntosh <cnm100@hotmail.com>
To   STATA LIST <statalist@hsphsun2.harvard.edu>
Subject   RE: st: survival analysis
Date   Tue, 21 Aug 2012 00:03:57 -0400

Be sure to also see:
 
Klein, J.P., & Moeschberger, M.L. (2003). Survival Analysis: Techniques for Censored and Truncated Data. (2nd ed.). New York, NY: Springer-Verlag. 
Royston, P., & Lambert, P.C. (2011). Flexible Parametric Survival Analysis Using Stata: Beyond the Cox Model. College Station, TX: Stata Press.
Cam
 
> Subject: Re: st: survival analysis
> From: sjsamuels@gmail.com
> Date: Mon, 20 Aug 2012 22:13:52 -0400
> To: statalist@hsphsun2.harvard.edu
> 
> One other thought: if your assessment detects an event that occurred since the
> previous assessment, but cannot be exactly dated, then you have interval, not
> right, censoring. Choices in Stata include -intcens- and -stpm- (findit) and
> grouped data approaches mentioned recently by Stephen Jenkins in
> http://www.stata.com/statalist/archive/2012-07/msg01095.html.
> 
> Steve
> 
> 
> The ending date for a censored observation is the last one for which you know
> that the subject did not have the outcome of interest. So it will _not_ be the
> date of the missed assessment, but an earlier or later one. An earlier date
> might be the date of the previous assessment. A later date could be one on
> which you have contacted the subject or proxy and can tell from the
> communication that that the subject did _not_ have the outcome of interest,
> because, for example, they had no symptoms.
> 
> 
> Steve
> sjsamuels@gmail.com
> 
> 
> On Aug 20, 2012, at 12:58 PM, Nikolaos Pandis wrote:
> 
> Hi to all.
> 
> I would like to ask the following:
> 
> For survival data (before stset) how would I indicate censored observations?
> For the observations with complete information (entry/exit dates and outcome) I have coded the outcome as 0 or 1 but I am not sure how to code patients lost before the end of the study. 
> Censored observations also have just entry dates. Would exit date (for censored observatiosn) be the end of study date or date of last assessment in which patient(s) went missing? 
> 
> Any comments would be appreciated.
> 
> Thank you,
> 
> Nick 
> 
> 
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