Why the study?
Does warfarin with an INR of 1.6 to 1.9 prevent stroke in patients with atrial fibrillation compared to untreated patients?
Population
Patients with atrial fibrillation
Comparison
Warfarin with an international normalized ratio… vs Warfarin with an INR of 1.0 to 1.1
Design
Editorial
Authors
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Warfarin with an INR of 1.6 to 1.9 is associated with an 80% or greater reduction in stroke risk compared to untreated patients, suggesting partial efficacy below the standard INR 2.0 threshold.
Does warfarin with an INR of 1.6 to 1.9 prevent stroke in patients with atrial fibrillation compared to untreated patients?
Warfarin with an INR of 1.6 to 1.9 is associated with an 80% or greater reduction in stroke risk compared to untreated patients, suggesting partial efficacy below the standard INR 2.0 threshold.
Robert G. Hart (1998) studied this question.
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