Differences in initiation and discontinuation of preventive medications and use of non-pharmacological interventions after acute coronary syndrome among migrants and Danish-born

Aims
The aim of this article is to assess initiation and discontinuation of preventive medication and use of non-pharmacological prevention interventions after acute coronary syndrome (ACS) among migrants to Denmark compared to the local-born Danish population, taking differences in comorbidity and sociodemographic factors into account.

Methods and results
In this large cohort study, we selected the population (n = 33 199) from nationwide registers and followed each individual among migrants and Danish-born 180 days after ACS. We identified the initiation and discontinuation of medications and the initiation and number of contacts for non-pharmacological interventions in the Register of Medicinal Products Statistics and the National Patient Register, and adjusted for comorbidity and sociodemographic factors. Non-Western migrants had lower relative risks for initiating adenosine diphosphate receptor (ADP)- and angiotensin-converting enzyme (ACE)-inhibitors (0.93, CI: 0.90; 0.96, and 0.91, CI: 0.87; 0.96) and patient education (0.95, CI: 0.92; 0.98). Further, non-Western migrants had higher hazard ratios for discontinuing medications (statins: 1.64, CI: 1.45; 1.86, ADP-inhibitors: 1.72, CI: 1.50; 1.97, β-blockers: 1.52, CI: 1.40; 1.64, and ACE-inhibitors: 1.72, CI: 1.46; 2.02), and fewer contacts for physical exercise and patient education (P < 0.001 and P = 0.011).

Conclusion
We identified differences between non-Western migrants and Danish-born in initiation and discontinuation of preventive medications and use of non-pharmacological interventions after ACS. These differences could not be explained by differences in comorbidity or sociodemographic factors.