Table 1 .

Predicted stroke risk based on CHADS₂ score.

CHADS2 Score	Adjusted Stroke Rate per 100 patient years (95% confidence interval)
0	1.9 (1.2–3.0)
1	2.8 (2.0–.8)
2	4.0 (3.1–5.1)
3	5.9 (4.6–7.3)
4	8.5 (6.3–11.1)
5	12.5 (8.2–17.5)
6	18.2 (10.5–27.4)

Source: Adapted from Gage et al. ¹⁷