topic Re: KM curve formatting in New SAS User

KM curve formatting

GS2 — Mon, 10 Feb 2020 13:13:25 GMT

Using SAS 9.4

I have the following code for a KM curve:

proc lifetest data = have plots=survival(test ATRISK(maxlen=50));
time TT_fail_months *failure2(0) ;
strata INDEX_TYPE_REV ;
label INDEX_TYPE_REV = 'Index Revision Type'
TT_fail_months = 'Time to Implant Failure (in Months)' ;
title 'Figure 2: Implant Survival Free of Reoperation for Infection';
run;

The code generates the curve I want, however I cannot figure out how to format the curve.

1. I need to change the title, which the title statement above does not do

2. right now by bins are 0 to 125 by 25 and I would like 0 to 120 by 12

3. I would like to make one of the 2 lines a dashed line (----) to make it easier to tell a difference if printed in black and white.

Thank you

Re: KM curve formatting

Rick_SAS — Mon, 10 Feb 2020 14:44:30 GMT

The documentation for PROC LIFETEST includes links to ways to modify many aspects of the KM plots.

The SAS/STAT documentation contains a chapter "Customizing the Kaplan-Meier Survival Plot," which is essential reading for analysts in this area.

I know the title and line patterns have explicit examples in the doc. I have never tried to change the tick values on the axis.

Re: KM curve formatting

GS2 — Mon, 10 Feb 2020 18:11:55 GMT

Thanks Rick! That documentation is quite helpful