On the other hand, a recent study reported the HRCT ground-glass opacity (GGO) score ≥4 (HR 4.8; 95% CI, 1.3–17.9), KL-6 >1,600 U/ml (HR 3.7; 95% CI, 1.5–9.1) were identified as independent predictors for progressive ILD (48). Here, MUC1 is linked to interstitial lung disease.