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RE: st: RE: Command "margin" after Cox Regression
From
"Weichle, Thomas" <[email protected]>
To
<[email protected]>
Subject
RE: st: RE: Command "margin" after Cox Regression
Date
Wed, 26 Oct 2011 10:36:11 -0500
Hi Yuval,
The predict() option for -margins- specifies the response and the
response will be the default prediction that would be produced by
-predict- after the underlying estimation command. For -stcox-, the
default prediction is the hazard ratio.
Based on your first margins command (margins, at(max_red=10) atmeans
predict(nohr)), it appears as though you are predicting the hazard since
you specified 'nohr' in the predict() option.
For your second margins command (margins, at(max_red=20) atmeans
predict(basesurv)), it appears as though you are receiving the error
message because you specified 'basesurv' in the predict() option.
Baseline survival is a function of time and not the beta coefficients.
Tom Weichle
Math Statistician
Center for Management of Complex Chronic Care (CMC3)
Hines VA Hospital, Bldg 1, C202
708-202-8387 ext. 24261
[email protected]
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