Re: st: Re: Kaplan Meier plot: adding vertical line at median survival

[Michael McCulloch <mm@pinest.org>]

Thanks Friedrich, the -legend(order(1 2 3))- really does the trick!
Michael


> Michael,
>
> See -help legend order-. You can suppress legend entries by omitting
> them from the list.
>
> . sts graph, by(drug) addplot((pci -0.035 `a1' 0.5 `a1' -0.035 `a2'
> 0.5 `a2' -0.035 `a3' 0.5 `a3', lcolor(black) legend(order(1 2 3))))
> yline(0.5, lpattern(dash))
>
> Friedrich
>
> On Sun, Nov 2, 2008 at 6:14 PM, Michael McCulloch <mm@pinest.org> wrote:
> >  Thanks Martin! This works splendidly. May I ask: the legend adds another
> >  group entitled "y/yb", which seems to refer to the vertical lines created.
> >  Is there a way to suppress this?
> >  Michael
> >
> > >  You could also automate some of your calculations:
> > >
> > >  **********
> > >  sysuse cancer.dta, clear
> > >  stset studytime
> > >  levelsof(drug), loc(levdrug)
> > >  foreach lev of loc levdrug{
> > >  _pctile studytime if drug==`lev'
> > >  loc a`lev'=r(r1)
> > >  }
> > >  sts graph, by(drug) addplot((pci -0.035 `a1' 0.5 `a1' -0.035 `a2' 0.5 `a2'
> > >  -0.035 `a3' 0.5 `a3', lcolor(black))) yline(0.5, lpattern(dash))
> > >  **********
> > >
> > >  HTH
> > >  Martin
> > >  _______________________
> > >  ----- Original Message ----- From: "Michael McCulloch" <mm@pinest.org>
> > >  To: "Statalist" <statalist@hsphsun2.harvard.edu>
> > >  Sent: Sunday, November 02, 2008 4:04 AM
> > >  Subject: st: Kaplan Meier plot: adding vertical line at median survival
> > >
> > > >  Greetings,
> > > >  I'd like to plot a Kaplan Meier graph with a vertical line at the point
> > > >  of median survival, where the line begins at the x-axis and ends at the
> > > >  point where that vertical line intersects the survival curve.
> > > >
> > > >  For example:
> > > >  sysuse cancer.dta
> > > >  stset studytime
> > > >  sts graph, by(drug)
> > > >
> > > >  In this example, for drug2 median survival is at 13 months, and for
> > > >  drug3, at 25 months, so I'd .
> > > >  Is this possible within the -sts graph- command? I'm using v9.2 and so
> > > >  don't have the manual graphical editing features of v10.
> > > >
> > > >  Thank you.
> > > >
> > > >  --
> > > >
> > > >  Best wishes,
> > > >  Michael McCulloch
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