Table 4

Interpractice variation in prevalence and treatment of atrial fibrillation in 211 general practices in England and Wales, 1994–1998

Mean Standard deviation Minimum Maximum
Prevalence per 100011.54.40.725.2
Percentage prescribed oral anticoagulants23.68.61.850.0
Percentage prescribed aspirin30.18.08.161.6
Number treated with anticoagulants per 1000 registered patients2.71.40.18.9