Impact of statin use on cardiovascular and hematologic outcomes among patients with myeloproliferative neoplasms.

Myeloproliferative neoplasms (MPNs), including polycythemia vera (PV), essential thrombocythemia (ET), and myelofibrosis (MF), are chronic myeloid neoplasms associated with increased risk of cardiovascular disease (CVD). Statins are a common group of cholesterol-lowering medications recommended for the primary and secondary prevention of CVD, including arterial thrombotic events. Emerging evidence suggests that statins may reduce the risk of developing MPNs and their use may be associated with improved survival. However, the effect of statins on cardiovascular and hematologic outcomes among patients with MPNs remains uncharacterized. We conducted a multicenter retrospective cohort study of patients with MPNs who had at least 1 transthoracic echocardiogram (TTE) from 2010 to 2024. Inverse probability of treatment weighting (IPTW) competing-risk regression analysis was performed to assess the association between statin use at time of index TTE on major adverse cardiovascular events (MACE), MPN disease progression, and all-cause death. Patients with MPN were analyzed as a whole and separately by type (ET or PV and MF). A total of 669 patients were included, 43.9% were on statin use, 50.5% were female, 83.9% were White, 78.8% had JAK2 driver mutation, and 72.9% had class I guideline indication for statin therapy. There were 267 (39.9%) patients with PV, 234 (35.0%) with ET, and 168 (25.1%) with MF. After IPTW, statin use was associated with lower risk of MACE but not MPN disease progression or all-cause death. Among patients with ET or PV, statin use was associated with lower risk of MACE but not MPN progression or all-cause death. Among patients with MF, there was no difference in MACE, leukemia progression, or all-cause death. Among patients with MPNs who underwent TTE, statin use was associated with lower risk of MACE, particularly among patients with ET or PV. However, there was no association between statin use and all-cause death or MPN disease progression. Statin therapy is underused in this patient population. Further studies are needed to explore the utility of statin therapy in patients with MPN and identify patients who would benefit most from statin therapy.