Table 4.
Categorical Net Reclassification Improvement of CHA2DS2-VASc Score for Ischemic Stroke or TIA Among Atrial Fibrillation Patients with Addition of Race/Ethnicity. Optum Clinformatics, 2009–2015
| Events | Non-events | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Post | Post | ||||||||
| Pre | <1% | 1 to 2% | ≥2% | Total | Pre | <1% | 1 to 2% | ≥2% | Total |
| <1% | 2526 | 33 | 0 | 2559 | 0 to 1% | 133795 | 2886 | 0 | 136681 |
| 1 to 2% | 104 | 972 | 22 | 1098 | 1 to 2% | 782 | 78031 | 2719 | 81532 |
| ≥2% | 0 | 50 | 287 | 337 | ≥2% | 0 | 604 | 44608 | 45212 |
| Total | 2630 | 1055 | 309 | 3394 | Total | 134577 | 81521 | 47327 | 263425 |
Categorical NRI (1-year risk categories: <1%, 1 to <2%, ≥2%) = −0.0445 (95% Cl −0.0666, −0.0254)
Proportion of events correctly reclassified (blue print): −0.0284
Proportion of non-events correctly reclassified (red print): −0.0161