C-indexes for the models in the derivation and validation cohorts
| C-index (95% CI) | Model A | Model B | Model C | Model D |
| Derivation cohort | 0.865 (0.840 to 0.890) | 0.881 (0.857 to 0.905) | 0.873 (0.849 to 0.898) | 0.888 (0.866 to 0.910) |
| Validation cohort | 0.878 (0.824 to 0.930) | 0.886 (0.832 to 0.938) | 0.879 (0.825 to 0.933) | 0.888 (0.836 to 0.940) |
Model A: including age, estimated glomerular filtration rate, and urine protein; Model B: including hemoglobin, serum uric acid, cardiovascular disease, primary disease, chronic disease management adherence and variables in Model A; Model C: including alpha-blockers, beta-blockers, calcium supplements, Chinese herbal decoction, Chinese patent medicines for dispelling turbidity and variables in Model A; Model D: including all the predictors.