The effects of cost-sharing on essential drug prescriptions, utilization of medical care and outcomes after acute myocardial infarction in elderly patients

Fig. 1: Discharge prescriptions and persistence of drug therapy (proportion of time during the first year after discharge that a patient was covered by the medication in question), with 95% confidence intervals, for cardiac drugs prescribed for patients with acute myocardial infarction for a 2-month period before and a 1-month period after changes in Quebec's drug coverage policy. The major changes in the drug policy took place on Aug. 1, 1996, and Jan. 1, 1997. ACE = angiotensin-converting enzyme.