In comparing the association between anti-MDA5 antibody with ILD with the association between anti-MDA5 antibody with RPILD, the pooled ORs were similar when using immunoprecipitation (OR: 15.48 vs. 20.31), as well as using ELISA (OR: 22.17 vs. 31.86). Here, IFIH1 is linked to interstitial lung disease.