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Re: st: Checking Proportional Hazards Assumption in Multiply Imputed Data


From   Steve Samuels <[email protected]>
To   [email protected]
Subject   Re: st: Checking Proportional Hazards Assumption in Multiply Imputed Data
Date   Tue, 20 Aug 2013 18:38:38 -0400

1. In your -mi estimate: stcox- command, add an interaction of a
predictor with time (tvc() and texp() options), and test the
significance of the coefficient.

2. -mi extract- a few imputated data sets; run (non-mi) -stcox-; then
run -estat phtest- with the "plot" option. The purpose here is informal
diagnosis, so just ignore the fact that the data were imputed.

Steve

On Aug 19, 2013, at 9:56 AM, Dr Murray Finkelstein wrote:

Hello all,

Is there a method to check the proportional hazards assumption for Cox regression in multiply imputed data sets?

-- 
Murray M. Finkelstein PhD MD CCFP
Department of Family and Community Medicine
Mt Sinai Hospital
60 Murray Street, 4th Floor, Box 25
Toronto, Ontario, Canada     M5T 3L9

Phone: 416-886-6448
Fax:     416-736-8543
E-Mail: [email protected]

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