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RE: sts test: displaying log-rank test of equality within a Kaplan Meier graph


From   "Philip Ryan" <[email protected]>
To   <[email protected]>
Subject   RE: sts test: displaying log-rank test of equality within a Kaplan Meier graph
Date   Fri, 12 Feb 2010 14:35:47 +1030

Michael

I note you wanted a "window".  Here is a box instead. I also correct my
misuse of the return scalars :-(


sysuse cancer.dta, clear
stset studytime
drop if drug==3
sts test drug
local chi_P  logrank P = `=round(chi2tail(r(df),r(chi2)), .01)'
sts graph, by(drug) risktable text(.05 5 "`chi_P'", place(ne) box
size(small) col(red))



Philip Ryan
University of Adelaide


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Michael McCulloch
Sent: Friday, 12 February 2010 1:23 PM
To: Statalist Statalist
Subject: sts test: displaying log-rank test of equality within a Kaplan
Meier graph

Dear Statalist members,
I'm creating a Kaplan-Meier graph, and also performing the log-rank  
test of equality, for example:

sysuse cancer.dta, clear
stset studytime
drop if drug==3
sts graph, by(drug) risktable
sts test drug

My question: is it possible to display the results of the log-rank  
test in a small window within the area of the Kaplan-Meier survival  
curve?


Best wishes,

Michael McCulloch
Pine Street Foundation
124 Pine Street
San Anselmo, CA 94960-2674
tel:	415-407-1357
fax: 	206-338-2391

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