IFIH1 and interstitial lung disease: In the setting of time to death from any cause, the univariate Cox proportional hazards regression analysis identified pulmonary bacterial infection (P = 0.005), RP-ILD (P < 0.001), MYOACT score (P < 0.001), DLCO% (P = 0.006), positivity of anti-MDA5 antibody (P < 0.001) and nintedanib therapy (P = 0.023) as factors significantly related to survival in follow-up.