Overall, patients in the treatment group were significantly more likely to receive a prescription for ticagrelor than clopidogrel (60% vs. 36%); 55% and 32% of patients in the usual care group were prescribed ticagrelor and clopidogrel, respectively. Nonpersistence, defined as a gap in P2Y12-inhibitor use of at least 30 days within 1 year, was significantly lower in the treatment group than it was in the usual care group based on patient reported analysis (13% vs. 16%).
However, the incidence of major adverse cardiac events was roughly 10% in both groups. The similar outcomes may stem from the fact that 28% of patients with vouchers did not fill their prescriptions for reasons that the study did not explore, said Dr. Wang.
All patients had health insurance: 64% private, 42% Medicare, 9% Medicaid. The average age of the patients was 62 years, and 31% were women. Patient demographics and clinical characteristics were similar between the groups.
The vouchers affected choice of treatment but didn’t help clinical outcomes, which suggests that copayment reduction should be part of a broader strategy to help patients with adherence over time, said Dr. Wang.