IFIH1 and interstitial lung disease: When comparing the association between anti-MDA5 antibody and ILD with the association between anti-MDA5 antibody and RPILD, we found that anti-MDA5 antibody was more associated with RPILD than ILD in the adult subset (OR: 24.82 vs. 10.50); conversely, in the juvenile subset, ILD was more frequent than RPILD (OR: 119.29 vs. 34.84).