Poster Presentations

P-9: The Impact of Prescription Medication Cost Coverage on Optimal Adherence to Hypertension and Diabetes Medications: A Repeated Cross-sectional Population-based Study

Mrs. Razan Amoud (BScPharm, MSc Student), Dr. Mhd Wasem Alsabbagh (BScPharm, PhD)

University of Waterloo

Background: Adherence to hypertension and diabetes mellitus medications is required in order to achieve optimal clinical outcomes. Medication cost can become an obstacle to adherence if patients do not have medication insurance coverage. No previous studies examined the impact of absence of insurance coverage on adherence to oral antihypertensive or antidiabetic medications in Canada. Also, the time-trend of non-adherence due to absence of medication insurance coverage has never been examined.

Methods: data from the Canadian Community Health Survey cycles 2007-2008, 2013 to 2014 will be used. A provincially representative sample from participating provinces will be included (Ontario and New Brunswick). Cohort of interest will include individuals who are at least 18 years of age, have hypertension or diabetes mellitus, answered the question about prescription medication insurance coverage, and answered the question about their adherence to oral antihypertensive or antidiabetic prescription medications. Multivariate adjusted logistic regression will be fitted to estimate the odds of non-adherence among uninsured individuals with hypertensive or diabetes along with the statistical significance of this association.

Conclusion: The study in progress will report the time-trend and impact of insurance prescription medication coverage on medication non-adherence to oral antihypertensive or antidiabetic medications in a representative provincial Canadian sample. It will also be able to identify any underlying factors affecting this relationship. The results of this study will enlighten researchers and policy-makers about health inequality in Canada and the need for national drug coverage policies.