The primary outcome of interest was proportion of patients adherent to medication regimens based on a mean proportion of days covered ( PDC ) greater than 0.80 in the year after hospital discharge using pharmacy refill data for 4 cardioprotective medications ( clopidogrel , - blockers , 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors [ statins ] , and angiotensin-converting enzyme inhibitors or angiotensin receptor blockers [ ACEI/ARB ] ) .