Geosocial Factors Associated With Adherence to Statin Medications

The Annals of Pharmacotherapy
Steven R EricksonJoshua Tootoo

Abstract

Individual patient characteristics, social determinants, and geographic access may be associated with patients engaging in appropriate health behaviors. To assess the relationship between statin adherence, geographic accessibility to pharmacies, and neighborhood sociodemographic characteristics in Michigan. The proportion of days covered (PDC) was calculated from pharmacy claims of a large insurer of adults who had prescriptions for statins between July 2009 and June 2010. A PDC ≥0.80 was defined as adherent. The predictor of interest was a ZIP code tabulation area (ZCTA)-level measure of geographic accessibility to pharmacies, measured using a method that integrates availability and access into a single index. We fit unadjusted models as well as adjusted models controlling for age, sex, and ZCTA-level measures of socioeconomic status (SES), racial isolation (RI) of non-Hispanic blacks, and urbanicity. More than 174 000 patients' claims data were analyzed. In adjusted models, pharmacy access was not associated with adherence (0.99; 95% CI: 0.96, 1.03). Greater RI (0.87; 95% CI: 0.85, 0.88) and urban status (0.93; 95% CI: 0.89, 0.96) were associated with lower odds of adherence. Individuals in ZCTAs with higher SES had higher od...Continue Reading

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Citations

Nov 29, 2020·Journal of the American Pharmacists Association : JAPhA·Jenny S GuadamuzDima Mazen Qato

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