Dear all,
I have a problem using stgtcalc:
In order to test Proportional Hazards assumption in a Cox model, I would
like to follow Patrick Royston and Peter Sasieni's suggestion
(http://www.stata.com/meeting/4uk/nonprop.html) and fit fractional
polynomials to the local estimates of the regression coefficients of the Cox
model by using fracpoly after stgtcalc.
I am using Stata9 and when I try to use stgtcalc as follows:
***
stset time trtt
stcox sex agecateg2 agecateg3
stgtcalc
***
I get the following error message after typing stgtcalc:
***
Data are st/Stata 6 and not st/Stata 5.
You are running the old Stata 5 version of st.
We provide it so that researchers may reproduce old analyses.
If you do not mean to be running the old system, type
. version 6
if you do mean to be running the old system, type
. version 5
stset ... fill in the dots with old syntax)
When you are done, type
. version 6
r(119);
***
I have tried
***
version 5:stset time trtt
version 5:stcox sex agecateg2 agecateg3
version 5:stgtcalc
***
But I get exactly the same error message.
I don't know how to stset in stata5 but in his example, P. Royston and P
Sasieni use the same stset I have used. Is it the data I must change?
Otherwise, is there an adaptation of stgtcalc to stata9?
Thank you so much for your help
Val�rie
Val�rie Jooste
Registre des tumeurs digestives
INSERM EMI 0106
Recherche �pid�miologique et clinique en canc�rologie digestive
Facult� de M�decine
BP 87900
21079 Dijon cedex
FRANCE
Tel : +33- 380 39 33 25
Fax : +33- 380 66 82 51
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