3782890 C-statistic concordance statistic 87 3782892 C-statistic calibration (predicted/observed proportions), and discrimination 1 3782894 C-statistic clinically significant difference in the discrimination 1 3782893 C-statistic cohort, RAI-A demonstrated superior discrimination 1 3782896 C-statistic Concurrent statistic 1 3782895 C-statistic Consistency statistics 1