Table 4
Stroke risk by CHADS
2
score
CHADS
2
score
Stroke risk %
95% CI
0
1.9
1.2 to 3.0
1
2.8
2.0 to 3.8
2
4.0
3.1 to 5.1
3
5.9
4.6 to 7.3
4
8.5
6.3 to 11.1
5
12.5
8.2 to 17.5
6
18.2
10.5 to 27.4