Low utilization of statins in patients with dermatomyositis/polymyositis and hyperlipidemia: a multicenter USA-based study (2013-2023).

Objective: While the cardioprotective benefits of statins for rheumatoid arthritis (RA) patients are well-established, there might be a hesitation in recommending them for dermatomyositis/polymyositis (DM/PM) patients with hyperlipidemia (HLD), particularly with myopathy. We sought to contrast statin prescription patterns between DM/PM-HLD and RA-HLD patients and delve into the mortality variations among DM/PM-HLD statin users and non-users.

Methods: We examined a decade's worth of anonymized US health data from the TriNetX database. Inclusion criteria were a subsequent HLD diagnosis after an initial DM/PM or RA diagnosis. We compared statin initiation rates and mortality outcomes, adjusting for demographics and cardiovascular risks through propensity score matching.

Results: The analysis comprised 33,000 RA-HLD and 1079 DM/PM-HLD patients. RA-HLD patients exhibited higher statin initiation (27.4%) than DM/PM-HLD patients (17.91%, p < 0.0001). Notably, DM/PM-HLD statin users (n = 311) presented a reduced mortality rate (75 deaths/1000/year) compared to non-users (n = 661) with 147 deaths/1000/year (p = 0.0273, HR = 0.515, CI 0.28-0.93).

Conclusion: There is a marked disparity in statin initiation between DM/PM-HLD and RA-HLD patients, accompanied by elevated mortality in DM/PM-HLD non-users. It is imperative for further research to elucidate this discrepancy and formulate patient-centric cardiovascular guidelines for DM/PM-HLD patients. Key Points • Statin initiation among patients with DM/PM-HLD is significantly lower than that with RA-HLD. • Mortality rates within the statin initiator DM/PM-HLD were significantly lower compared to non-statin DM/PM-HLD initiators, spanning multiple time intervals.