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

 From Michael McCulloch <[email protected]> To [email protected] Subject Re: st: Re: Kaplan Meier plot: adding vertical line at median survival Date Sun, 2 Nov 2008 18:19:00 -0800

```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 <[email protected]> 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" <[email protected]>
To: "Statalist" <[email protected]>
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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