Table 1.
Event rates (95% CI) of hospital admission and death due to thromboembolism per 100 person years [based on Olesen et al. (2011a)].
| Score/risk category | 1 year's follow-up | 5 years' follow-up |
|---|---|---|
| CHA2DS2-VASc | ||
| 0 | 0.78 (0.58 to 1.04) | 0.69 (0.59 to 0.81) |
| 1 | 2.01 (1.70 to 2.36) | 1.51 (1.37 to 1.67) |
| 2 | 3.71 (3.36 to 4.09) | 3.01 (2.83 to 3.20) |
| 3 | 5.92 (5.53 to 6.34) | 4.41 (4.21 to 4.61) |
| 4 | 9.27 (8.71 to 9.86) | 6.69 (6.41 to 6.99) |
| 5 | 15.26 (14.35 to 16.24) | 10.42 (9.95 to 10.91) |
| 6 | 19.74 (18.21 to 21.41) | 12.85 (12.07 to 13.69) |
| 7 | 21.50 (18.75 to 24.64) | 13.92 (12.49 to 15.51) |
| 8 | 22.38 (16.29 to 30.76) | 14.07 (10.80 to 18.33) |
| 9 | 23.64 (10.62 to 52.61) | 16.08 (8.04 to 32.15) |
| CHA2DS2-VASc | ||
| Low risk (0) | 0.78 (0.58 to 1.04) | 0.69 (0.59 to 0.81) |
| Intermediate risk (Ball et al., 2013) | 2.01 (1.70 to 2.36) | 1.51 (1.37 to 1.67) |
| High risk (Camm et al., 2012a, Kirchhof et al., 2011, Pisters et al., 2012, Camm et al., 2010, Choudhury and Lip, 2004, Lip and Lane, 2015b, Fibrillation and Group, 2007, Banerjee et al., 2012a) | 8.82 (8.55 to 9.09) | 6.01 (5.88 to 6.14) |
CHA2DS2-VASc: C, congestive heart failure, H, hypertension, A2, age at least 75 years, D, diabetes, S2, previous stroke, TIA, or systemic embolism, V, vascular disease, A, age 65 through 74 years, Sc, sex category female sex.