The predictors of warfarin use

A: Patients with atrial fibrillation are five times more likely than other people to have a stroke. Warfarin reduces this risk, but is not prescribed for all the patients who could benefit. The University of Connecticut has therefore investigated who is not being treated.

The reviewers selected 28 observational studies which reported the odds of receiving warfarin for stroke prevention. These studies included more than 100,000 patients in the US.

There were more than 50 different prescriber and patient characteristics