Polymyositis/dermatomyositis readmissions: analysis of the nationwide readmission database.

Background: There is a scarcity of national population-based studies on polymyositis (PM)/dermatomyositis (DM) readmissions in the USA. In this study, we aim to describe the rates, reasons for readmissions, and characteristics of readmissions for adults hospitalized for PM/DM in the USA.

Methods: We analyzed the 2018 Nationwide Readmissions Database (NRD).