Trends in Hospitalizations of Patients with Idiopathic Inflammatory Myopathies: Long-Term Observational Study, 2010–2024

Background/Objectives: Idiopathic inflammatory myopathies (IIMs) are very rare, chronic, immune-mediated diseases that clinically manifest with myositis symptoms and extramuscular manifestations. The rarity of the disease makes it difficult to conduct double-blind studies, and large population-based studies are needed to improve our knowledge of them. This study aims to analyze the hospitalization rates and trends of IIMs between 2010 and 2024. Additionally, a characterization of the IIM patient population in Poland was conducted.