Background: No single quality improvement instrument has proved consistently effective, but multifaceted interventions are believed to have the greatest impact. However, only little is known regarding what combinations are likely to be successful.
Objective: To evaluate the impact of a multifaceted intervention strategy combining GP registrations, outreach visits and feedback, targeting secondary prevention of ischemic heart disease in general practice.
Methods: A randomised controlled trial including 28 GPs in Ringkjøbing County, Denmark. Half of the GPs received outreach visits and feedback on their prescribing of heart disease drugs. Evaluation was based on registration of consultations with patients suffering from ischemic heart disease.
Results: The intervention had a statistically significant impact on prescribing of lipid lowering drugs [odds ratio 1.59; 95% confidence interval (CI) 1.00 to 2.53] and acetylsalicylic acid (odds ratio 2.54; 95% CI 1.21 to 5.31).
Conclusion: An intervention strategy combining outreach visits, feedback and GP registrations is a promising way of improving the quality of preventive treatment in general practice.