Treatment Patterns Among Patients with Rheumatoid Arthritis in Puerto Rico

Racial and ethnic disparities in rheumatoid arthritis (RA) have been identified in the United States, with higher levels of disease activity and worse functional status reported in Hispanic patients compared with their white counterparts. Although RA is one of the most prevalent health conditions in Puerto Rico, few studies have previously examined the characteristics or treatment patterns of patients receiving biological and targeted synthetic disease-modifying anti-rheumatic drugs (b/tsDMARDs) in this population.This was a retrospective cohort study using data extracted from the Advanced Business Management Organization database, which represents around 70% of pharmacy claims in Puerto Rico. Patients with RA were included if they had ≥ 1 prescription for any approved b/tsDMARD during the index period (January 2016 to July 2018), and ≥ 2 years of follow-up. The objective was to describe and compare the demographic and clinical characteristics of patients with RA being treated with b/tsDMARD therapy in Puerto Rico, and to evaluate the treatment patterns among these patients.Most patients (74%) received tumor necrosis factor inhibitors (TNFis) as index therapy, followed by abatacept (17%), Janus kinase inhibitors (JAKis; 5%), and other non-TNFis (4%). Similar trends were observed in subsequent lines of therapy, although abatacept was more frequently used in these later lines versus index therapy. At 2 years, 62% of patients had discontinued their index therapy and 17% had switched to an alternative b/tsDMARD; only 21% persisted with index therapy. The percentage of patients who were persistent with their index therapy at the end of year 2 was 28% for JAKis, 36% for abatacept, 41% for TNFis, and 45% for other non-TNFis.These findings demonstrate that despite the availability of several b/tsDMARDs, patients with RA in Puerto Rico still experience substantial treatment disruption, with almost two-thirds of patients discontinuing their index therapy within 2 years.