topic Re: 95% CIs for Survival ROC curve from PROC PHREG in Statistical Procedures

95% CIs for Survival ROC curve from PROC PHREG

erica_conley — Fri, 14 Dec 2018 21:48:39 GMT

I am trying to create a ROC plot at time 6 months with 95% error bars plotted as well in SAS v9.4. I have the ROC curve generated but am having issues with getting the 95% CIs. I am sure there is a simple option that I am missing, but it is eluding me. I am unable to post the data I am using but it is a standard time to data set. I described my variables below as well as posted my PROC PHREG code.

Time=is numeric time variable in months

cns= censor variable 0=censor 1=event

lvaluen=numeric lab value for my test.

proc phreg data=work concordance plots(cl)=roc rocoptions(outroc=rocout at=6);
 model time*cns(0)=lvaluen;
run;

If anyone has a suggestion I would really appreciate it!

Re: 95% CIs for Survival ROC curve from PROC PHREG

LEESK — Tue, 18 Dec 2018 04:02:05 GMT

proc phreg data=work concordance plots(cl)=roc rocoptions(outroc=rocout at=6);
 model time*cns(0)=lvaluen / risklimits
run;

You need to "risklimits" option to see 95%.

Re: 95% CIs for Survival ROC curve from PROC PHREG

erica_conley — Tue, 18 Dec 2018 14:41:14 GMT

Thanks so much for the response. However the risklimits option is used to generate the confidence intervals for the hazard ratios, and I need the CIs for the sensitivity values.