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

[Michael Norman Mitchell <Michael.Norman.Mitchell@gmail.com>]

Dear Michael

  If I understand your last message, you want to be able to change the 
placement of the "log rank P= 3.67" text. If so, you can control that by 
the coordinates specified in the "text()" option. For example, if you do 
this...

sysuse cancer.dta, clear
stset studytime
drop if drug==3
sts test drug
local chi_res  logrank P = `=round(r(chi2), .01)'
sts graph, by(drug) risktable text(.95 28 "`chi_res'", size(small) col(red))

  The text will be displayed in the upper right corner, because the 
coordinates are y=.95 x=28. You can fiddle with those (Y,X) values to 
place the text whereever yo like. I hope that helps,

Michael N. Mitchell
See the Stata tidbit of the week at...
http://www.MichaelNormanMitchell.com
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On 2010-02-11 8.28 PM, Michael McCulloch wrote:
> Thanks Phillip! This gives me the idea. May I ask:
>     * regardless of what place option I use: ne, se, nw, sw, etc., 
> they all put the text box in the lower left corner. I've read -help 
> compassdirstyle- and
>     * bexpand also doesn't expand the size of the box.
> Michael
>
>
> On Feb 11, 2010, at 8:05 PM, Philip Ryan wrote:
>
> > 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: owner-statalist@hsphsun2.harvard.edu
> > [mailto:owner-statalist@hsphsun2.harvard.edu] 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
> >
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/help.cgi?search
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
> >
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/help.cgi?search
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
>
>
> Best wishes,
>
> Michael McCulloch
> Pine Street Foundation
> 124 Pine Street
> San Anselmo, CA 94960-2674
> tel:    415-407-1357
> fax:     206-338-2391
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
*
*   For searches and help try:
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*   http://www.ats.ucla.edu/stat/stata/