Table IV. Categorial net reclassification improvement (NRI), continuous NRI, and integrated discrimination improvement (IDI) using the systolic blood pressure (SBP) alone model as reference.

CI: Confidence interval; t-bil: total bilirubin. Categorical NRIs are calculated by defining hypertension as having a predicted probability of 0.5 or greater by logistic regression and no hypertension as having a predicted probability of less than 0.5.