Association of Hispanic ethnicity and linguistic acculturation with cardiovascular medication adherence in patients with suspected acute coronary syndrome

Despite a higher prevalence of cardiovascular disease (CVD) risk factors, Hispanic-Americans have lower rates of CVD-related and all-cause mortality, as well as higher life expectancy than non-Hispanic whites - a phenomenon known as the Hispanic health paradox. However, this survival benefit attenuates with increased acculturation to Western lifestyles, potentially due to adoption of unhealthy behaviors. Accordingly, we assessed whether Hispanic ethnicity and linguistic acculturation, as measured by English proficiency, were associated with nonadherence to cardiovascular medications. We enrolled patients presenting to an academic medical center emergency department with suspected acute coronary syndrome between May 2014 and November 2017. Ethnicity, native language, and English proficiency were self-reported. Cardiovascular medication adherence was assessed using an electronic pill bottle that recorded the date and time of each bottle opening. Generalized linear models with a logit link were used to examine the association of Hispanic ethnicity and English proficiency with daily cardiovascular medication adherence, adjusting for demographics, comorbidities, and dosing frequency of the electronically-monitored medication. Among 332 included patients, mean age was 61.68 +/- 12.05 years, 43.07% were women, and 62.95% were Hispanic, of whom 80.38% were native Spanish-speakers. Overall, Hispanics had higher odds of medication adherence than non-Hispanics (adjusted OR 1.31, 95% CI 1.16-1.49, p < 0.001). However, among native Spanish-speaking Hispanics, greater English proficiency was associated with lower odds of medication adherence (adjusted OR 0.80 per 1-point increase in English proficiency, 95% CI 0.75-0.86, p < 0.001). Although Hispanics had better medication adherence than non-Hispanics overall, increased linguistic acculturation among native Spanish-speakers was associated with worse adherence behaviors.