1. From: Effect of the Medicare Part D Coverage Gap on Medication Use Among Patients With Hypertension and Hyperlipidemia
Ann Intern Med. 2012;156(11): doi: /
Figure Legend:
Month 0 represents the calendar month of entry into the coverage gap. The figures are based on mean differences in adjusted monthly adherence rates for each study group relative to the control group of fully eligible low-income subsidy patients. The adjusted monthly adherence rates were estimated with segmented regression models using generalized estimating equations with first-order, autoregressive correlation structure; variables for study groups, coverage gap status, months, and months after entering coverage gap; and interaction terms between group indicators and time-related variables. Data were adjusted for age, sex, race and ethnicity, Medicare entitlement status, metropolitan status (urban or rural), census region of residence, area-level characteristics (per capita income, unemployment rate, and education level) in beneficiary's county of residence, and prescription drug hierarchical condition category risk score. Error bars indicate 95% CIs obtained with 500 bootstrapped replicates.
Date of download: 12/27/2017
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