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st: Spline after Cox regression
From
Etan Lakam <[email protected]>
To
statalist <[email protected]>
Subject
st: Spline after Cox regression
Date
Fri, 5 Jul 2013 16:23:59 -0400
Dear Listers,
I am doing Cox-regression with a continuous exposure ffa and the
outcome hf, I have been trying to model it as cubic spline.
Here is how I approached it, adjusting for age, sex, and race, however
it is coming up with the message error below, and I cannot obtain the
graph
I do not have a clue about what is happening.
Thank you in advance for your help.
Best,
Etan
mkspline rlnffa= lffa, cubic nknots(5)
stcox rlnratio* sex race age
adjust race=0 sex=1 age, by(lnffa) ci replace exp
------------------------------------------------------------------------------------------
Dependent variable: _t Command: stcox
Variables left as is: rlnffa1, rlnffa2
Covariate set to mean: age = 53.900191
Covariates set to value: race = 0, sex = 1
------------------------------------------------------------------------------------------
too many values
r(134);
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