Scoring System

Your doctor will assess your risk of stroke, and may use a scoring system called CHA2DS2-VASc

Using this scoring system, your doctor will calculate your points based on your risk factors for stroke (listed below):1

  • High blood pressure, also known as hypertension − 1 point 
  • Congestive heart failure − 1 point
  • Age −  1 point if you are aged 65 to 74 years or 2 points if you are aged 75 years and older
  • Diabetes − 1 point
  • Previous stroke or transient ischaemic attack, also known as TIA − 2 points
  • Vascular disease − 1 point
  • Gender − 1 point if you are a female

Following this assessment, you and your doctor may discuss whether an anticoagulant is the right medicine for you and, if so, which one is the most appropriate. Usually, if you are a female and your score is two or more or if you are a male and your score is one, your doctor may consider prescribing an anticoagulant.1

Your risk of stroke may change with age and other medical problems. Therefore, if your doctor does not prescribe you an anticoagulant at this time, you should be regularly reassessed to determine if you need treatment to help reduce your risk of stroke at some point.1

If you already take an anticoagulant, your doctor should assess you at least once a year to determine whether your current treatment is still the most appropriate treatment for you or whether a different anticoagulant would be a better option.1

1. Stroke Association. Atrial fibrillation (AF) and stroke. May 2019. Available at Last accessed November 2020.

PP-ELI-HKG-0651 JUN 2021