topic Re: Harrell's C indexes in competing risk model in Statistical Procedures

Harrell's C indexes in competing risk model

haoduonge — Sat, 23 Sep 2023 00:47:42 GMT

Hi,

Hi all,

Can we calculate the Harrell's C indexes in competing risk model as below?

Thank you!

Hao

proc phreg data=out_withclass;

class X1(REF='0');

model TIME_YRS *OUTCOME(0)=X1 X2/eventcode=1 rl;

run;

Re: Harrell's C indexes in competing risk model

StatDave — Sat, 23 Sep 2023 18:18:39 GMT

Use the CONCORDANCE option in the PROC PHREG statement. You can also use the PLOTS=ROC, PLOTS=AUC, and ROCOPTIONS to draw and control ROC curves. See the PHREG documentation for discussion of these options and an example.

Re: Harrell's C indexes in competing risk model

haoduonge — Sat, 23 Sep 2023 20:15:04 GMT

I think it only works with Cox model, not with competing risk model (F & G), right?

Hao

Re: Harrell's C indexes in competing risk model

StatDave — Sat, 23 Sep 2023 20:33:39 GMT

Sorry... that's correct. The concordance statistics (and ROC analysis) are not available with that model.

Re: Harrell's C indexes in competing risk model

OsoGris — Mon, 25 Sep 2023 10:17:23 GMT

You can try using the CONCORDANCE option on the PROC PHREG statement. I don't know if that's enabled, necessarily, for the competing risks analysis.