For the meta-analysis for DM with RPILD versus without RPILD, the actual power was more than 99% (α = 0.05) when the positive rates of anti-MDA5 antibody for DM-RPILD and DM without RPILD were defined as 82.80% and 14.18%, respectively (Supplementary Figure 15). This evidence concerns the gene IFIH1 and dermatomyositis.