C-indices with 95% CI for the ABC-AF-death risk score in ARISTOTLE and RE-LY comparing geographic regions.
| ARISTOTLE | RE-LY | |||
| C-index | 95% CI | C-index | 95% CI | |
| Death | ||||
| All | 0.743 | 0.728 to 0.759 | 0.741 | 0.721 to 0.761 |
| Asia/Pacific | 0.765 | 0.725 to 0.805 | 0.806 | 0.760 to 0.852 |
| Europe | 0.740 | 0.712 to 0.767 | 0.735 | 0.707 to 0.762 |
| Latin America | 0.715 | 0.686 to 0.743 | 0.677 | 0.606 to 0.749 |
| North America | 0.763 | 0.733 to 0.793 | 0.743 | 0.693 to 0.792 |
| Other | 0.734 | 0.662 to 0.806 | ||
ABC-AF death score, Age, Biomarkers (NT-proBNP, troponin T-hs and GDF-15), Clinical history (heart failure); ARISTOTLE, Apixaban for Reduction in Stroke and Other Thromboembolic Events in Atrial Fibrillation; RE-LY, Randomized Evaluation of Long-Term Anticoagulation Therapy.