Hi everyone 👋

There are packages in STATA for net reclassification improvement (NRI) but they do not take into account censoring. The original idea is to measure the extent to which addition of a new marker will cause improvement clinically; but it is defined for non-survival setting. The extended formula of NRI has been described by Pencina et al. in 2014 but I could not find a program for it in STATA.

I found a package for R (survIDINRI), but I am not an R user.

Could you please help me out?

Thanks

M.J. Pencina, R.B. D’Agostino Sr., E.W. Steyerberg. Extensions of net reclassification improvement calculations to measure usefulness of new biomarkers. Stat Med, 30 (2011), pp. 11-21