Table 1.

CHADS₂ and CHA₂DS₂-VASc stroke risk scoring systems and adjusted stroke rates based on CHADS₂ and CHA₂DS₂-VASc scores

	Stroke risk scoring systems		Adjusted stroke rate based on CHADS2 score		Adjusted stroke rate based on CHA2DS2-VASc score
	CHADS2 scoring system	CHA2DS2-VASc scoring system	CHADS2 score	Adjusted stroke rate (%/year)	CHA2DS2-VASc score	Adjusted stroke rate (%/year)
Congestive heart failure	1	1	0	1.9	0	0
Hypertension	1	1	1	2.8	1	1.3
Age ≥75 years	1	2	2	4.0	2	2.2
Diabetes	1	1	3	5.9	3	3.2
Previous stroke or TIA	2	2	4	8.5	4	4.0
Vascular disease	–	1	5	12.5	5	6.7
Age, 65–74 years	–	1	6	18.2	6	9.8
Female sex	–	1	–	–	7	9.6
Maximum score	6	9	–	–	8	6.7
	–	–	–	–	9	15.2

Note: Data from Gage et al,¹⁰,¹² Lip et al,¹³ and Camm et al.¹⁵

Abbreviations: CHADS₂, Congestive heart failure, Hypertension, Age ≥75 years, Diabetes mellitus, and Stroke or TIA previous event (2 points); CHA₂DS₂-VASc, Congestive heart failure/left ventricular dysfunction, Hypertension, Age ≥75 years (2 points), Diabetes, Stroke or TIA previous event/thromboembolism (2 points), Vascular disease, Age 65–74 years, and Sex category (female); TIA, transient ischemic attack.