topic PHREG in Statistical Procedures

PHREG

Altal — Mon, 10 Mar 2014 17:18:41 GMT

in PROC PHREG, is it possible to obtain a "failure" plot instead of a survival plot?

for example, below will produce an adjusted survival curve.

proc phreg data=x plots(overlay)=s;

class trt;

model;

baseline covariates=x out=y SURVIVAL=Survival /diradj group=trt;

run;

what I'm interested in is a failure curve to show cumulative probability of failure

In PROC LIFETEST when can request to change the default survival to failure curve. Is this available in PHREG?

proc lifetest data=x plot=(survival ( failure));

run;

Thanks

Re: PHREG

JacobSimonsen — Mon, 10 Mar 2014 17:23:29 GMT

Hi,

No, the probability plot of failure is not possible to obtain directly from phreg - not as far as I know.

But, it is not more difficult to obtain than to calculate 1-survivalprobability.

data y;

set y;

prob_of_failure=1-survival;

run;

Jacob

Re: PHREG

Altal — Tue, 11 Mar 2014 12:18:28 GMT

Thanks for response. I couldn't get it to work using any of the proc options. However, I was able to manipulate the template for the survival plot (Stat.Phreg.Graphics.Survival), and specifying (y=eval(1-SURVIVAL) ) in the seriesplot statement.

Re: PHREG

OsoGris — Mon, 25 Jan 2016 14:32:38 GMT

JacobSimonsen is correct. You can post-process the BASELINE data set to compute failure = 1 - survival and then plot failure versus time with PROC SGPLOT (for an ODS Graphics type plot) or PROC GPLOT (for a traditional graphics type plot).

Re: PHREG

OsoGris — Mon, 25 Jan 2016 14:33:55 GMT

That is a good solution for those comfortable with modifying the underlying ODS Graphics template for the SurvivalPlot.