title: Racial/Ethnic Differences in Cost-Related Nonadherence and Medicare Part D: A Longitudinal Comparison.
abstract: Little is known about whether racial and ethnic disparities in cost-related medication nonadherence (CRN) have changed since the implementation of Medicare Part D. This longitudinal study examined the impact of Part D on CRN among racial and ethnic minority Medicare beneficiaries, age 65 and older. Nationally representative data were obtained from the Prescription Drug Study and Health and Retirement Study. A differences-in-differences approach was used to compare CRN among non-Hispanic Blacks, Hispanics, and non-Hispanic Whites. The results indicate CRN was higher among the two minority groups than among non-Hispanic Whites before and after Medicare Part D. Mixed-effects logistic regression analyses show that CRN did not significantly change between pre- and post-Medicare Part D for any of these three groups. However, older non-Hispanic Blacks and Hispanics had a larger reduction in CRN than non-Hispanic Whites. These findings suggest that despite Medicare Part D, racial and ethnic disparities in CRN persist.
authors.forename: Louanne
authors.initials: L
authors.lastname: Bakk
mesh_terms: D001741:Black or African American / Q000706:statistics & numerical data*; D000368:Aged; D003365:Costs and Cost Analysis / Q000706:statistics & numerical data*; D005260:Female; D054625:Healthcare Disparities / Q000191:economics / Q000208:ethnology*; D006630:Hispanic or Latino / Q000706:statistics & numerical data*; D006801:Humans; D016015:Logistic Models; D008137:Longitudinal Studies; D008297:Male; D054524:Medicare Part D / Q000191:economics*; D055118:Medication Adherence / Q000208:ethnology*; D008913:Minority Groups / Q000706:statistics & numerical data*; D014481:United States; D044465:White People / Q000706:statistics & numerical data