Prescription drug coverage satisfaction and medication nonadherence among Medicare beneficiaries with cancer.

BACKGROUND

Medication nonadherence among older patients with cancer can have profound health consequences. This study examines the association between prescription drug coverage satisfaction and medication nonadherence among Medicare beneficiaries with cancer.

METHODS

We analyzed the 2017 Medicare Current Beneficiary Survey Public Use File of beneficiaries aged ≥65 years with reported non-skin cancer (n = 806). Beneficiaries were considered to have medication nonadherence if they reported: skipping doses, taking smaller doses than prescribed, or delaying or not filling a prescription because of cost. A survey-weighted logistic model, adjusted for covariates, was conducted to examine the association between prescription drug coverage satisfaction and medication nonadherence.

RESULTS

Of study beneficiaries with cancer, 14.7% reported medication nonadherence. Higher proportions of beneficiaries with medication nonadherence were dissatisfied with the amount paid for medications (33.2% vs. 11.0%, p < 0.001) and the medications included on formulary (29.5% vs 5.2%, p < 0.001). In the adjusted analysis, the risk for medication nonadherence was higher among those who were dissatisfied with the amount paid for medications (OR = 2.22; p = 0.050) and the medications included on formulary (OR = 5.03; p = 0.005).

CONCLUSIONS

Strategic mitigation of these barriers is essential to improving health outcomes in this at-risk population.