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st: Proportional Hazards Assumption


From   Steve Samuels <[email protected]>
To   [email protected]
Subject   st: Proportional Hazards Assumption
Date   Sun, 23 Dec 2012 08:30:43 -0500

Oliver Eger <[email protected]> asked these questions when he finished a
thread about a another topic. For his benefit, I repost under a more
appropriate topic heading.

Steve

On Dec 20, 2012, at 3:46 PM, Oliver Eger wrote:

In Stata testing of the PH assumption is quite easy, but what makes me a
little irritated: all commands for checking the PH assumption are
related to the Cox analysis. But: If the propotional hazard assumption
is violated, the results from cox models as well as from parametric
models like Weibull have to be handled with caution, isn´t it?

Why are there no commands like "estat phtest" after stcox, to check the
PH assumption directly after a streg command?


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