IFIH1 and dermatomyositis: Anti-MDA5 antibody was associated with the ILD of DM patients with the immunoprecipitation method (OR = 15.48, 95% CI: 9.18–26.12, P < 0.001), as well as with the ELISA method (OR = 22.17, 95% CI: 6.25–78.65, P < 0.001).