IFIH1 and dermatomyositis: The pooled OR showed that the frequency of anti-MDA5 antibody in DM with RPILD was significantly higher than in DM without RPILD in the adult subgroup (OR = 24.82, 95% CI: 15.55–39.61, P < 0.001), as well as in the juvenile subgroup (OR = 34.84, 95% CI: 3.88–312.62, P = 0.002).