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Re: st: survival analysis
From
Nikolaos Pandis <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: survival analysis
Date
Wed, 22 Aug 2012 00:29:14 -0700 (PDT)
Dear Camero and Steve,
Thank you for the valuable comments.
Nick
________________________________
From: Cameron McIntosh <[email protected]>
To: STATA LIST <[email protected]>
Sent: Tuesday, August 21, 2012 7:03 AM
Subject: RE: st: survival analysis
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: [email protected]
> Date: Mon, 20 Aug 2012 22:13:52 -0400
> To: [email protected]
>
> 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
> [email protected]
>
>
> 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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