concordance index for matched case–control studies (mC)

[AreejAloufi]

Hi
I'm a new Rstudio user working on a matched case-control and I used the method demonstrated in the article “ A concordance index for matched case–control studies with applications in cancer risk ” by Brentnall et al (2014)
They provided an R code to produce the mC in matched case-control studies as a replacement to the area under the receiver operating characteristic (ROC) curve (AUC) to measure how well a variable discriminates between cases and controls.

My question is how to set the confidence intervals and where to get it from the results or Data?

[technocrat]

@AreejAloufi

A concordance index for matched case–control studies with applications in cancer risk ” by Brentnall et al (2014)

The link is password protected, and none of the other sources I could find have the code. Without the code or experience in using the algorithm, providing guidance is difficult. See the FAQ: How to do a minimal reproducible example reprex for beginners.

[AreejAloufi]

Sorry for that, this is a screen from R
Hopefully you can find the issue and guide me

Many thanks

[technocrat]

A screenshot does not substitute for a reprex. See the FAQ: How to do a minimal reproducible example reprex for beginners.