January 1, 2009Thrombosis and Haemostasis
Atrial fibrillation and stroke risk prevention in real-life clinical practice
Why the study?
Does warfarin reduce the incidence of stroke in chronic atrial fibrillation patients?
Population
>51,000 chronic atrial fibrillation patients aged ≥40 years from the United Kingdom General Practice…
Comparison
Warfarin (current use) vs Past use or no use of warfarin
Design
Editorial
Authors
Discussion
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Implication
Real-world data confirms that warfarin significantly reduces stroke risk in patients with atrial fibrillation, particularly in the elderly, consistent with clinical trial evidence.
Key Points
- Assess the effectiveness of antithrombotic therapies, specifically warfarin and aspirin, for stroke prevention among patients with atrial fibrillation in routine clinical practice.
- Analysis of general practice records from the United Kingdom General Practice Research Database (1987 onwards) covering >51,000 chronic atrial fibrillation patients aged ≥40 years.
- Comparison of stroke incidence between current use, past use, and non-use of warfarin and aspirin, adjusting for age, sex, and baseline stroke risk profiles.
- Current warfarin use was associated with a 38% reduction in stroke compared to past use (RR 0.62, 95% CI 0.54–0.71) and a 67% reduction compared to non-use (RR 0.33, 95% CI 0.30–0.35).
- Warfarin reduced stroke risk by 45% in patients aged ≥75 years and by 14% in younger patients, whereas current versus past aspirin use demonstrated no difference in stroke rates (RR 1.04, 95% CI 0.94–1.15).
Structured PICO
Does warfarin reduce the incidence of stroke in chronic atrial fibrillation patients?
P
Population
>51,000 chronic atrial fibrillation patients aged ≥40 years from the United Kingdom General Practice Research Database
I
Intervention
Warfarin (current use)
C
Comparator
Past use or no use of warfarin
O
Outcome
Incidence of strokehard clinical
Real-world data confirms that warfarin significantly reduces stroke risk in patients with atrial fibrillation, particularly in the elderly, consistent with clinical trial evidence.
Cite This Study
Tay et al. (2009) studied this question.