topic X axis tick marks in lifetest. in Statistical Procedures

X axis tick marks in lifetest.

bentleyousley — Wed, 18 Nov 2015 00:24:06 GMT

I'm capturing the output of proc lifetest through ods. I need to customize the tick interval on a survival plot for the x axis such that the ticks have values of 0 to 18 by intervals of 1.5.

The lifetest procedure code is:

/*** Compute Kaplan Meier Statistics ***/
ods rtf file = "(directory path)\figures\f4_1.rtf"
style=rtf;

ods graphics on;
proc lifetest data = km1
timelist=0 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 16.5 18
plots = survival(atrisk=0 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 16.5 18)
;
time months * event(0);
id usubjid;
strata TRT01PN;
title "Kaplan-Meier plot of PFS based on central review - Figure 4.1";
run;
ods graphics off;
ods listing;
run;

The at-risk table reports at the proper intervals but the ticks on the plot have intervals of 5 instead of 1.5. How do I make the ticks occur at 1.5 intervals?

Thank you for your help!

Re: X axis tick marks in lifetest.

Jagadishkatam — Wed, 18 Nov 2015 00:29:28 GMT

Try the intervals option in proc lifetest

ods rtf file = "(directory path)\figures\f4_1.rtf"
style=rtf;

ods graphics on;
proc lifetest data = km1 intervals=(0 to 18 by 1.5)
timelist=0 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 16.5 18
plots = survival(atrisk=0 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 16.5 18)
;
time months * event(0);
id usubjid;
strata TRT01PN;
title "Kaplan-Meier plot of PFS based on central review - Figure 4.1";
run;
ods graphics off;
ods listing;
run;

Re: X axis tick marks in lifetest.

bentleyousley — Wed, 18 Nov 2015 01:18:22 GMT

Thank you for responding. I tried your suggestion but the x axis still shows intervals of 5 instead of 1.5.

Re: X axis tick marks in lifetest.

Jagadishkatam — Wed, 18 Nov 2015 01:26:09 GMT

it is strange i thought it will work. Could you please comment the timelist and try once.

Re: X axis tick marks in lifetest.

bentleyousley — Wed, 18 Nov 2015 02:54:43 GMT

Thank you for responding. I completely removed the timelist from the code. I'm still seeing the same interval of 5.