CHADS₂ score

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• The CHADS₂ is a stroke-risk index for patients with atrial fibrillation.
• Tt is estimated by summing the points assigned to several conditions.
• The estimated annual risk of stroke ranges from:
  • 1.9% (score 0) - to - 18.2% (score 6)

CHADS2 Score	Stroke Risk %	95% CI
0	1.9	1.2–3.0
1	2.8	2.0–3.8
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

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Content by Dr. Íomhar O' Sullivan 20/05/2010. Last review Dr. ÍOS 12/04/11