MUC1 and interstitial lung disease: Univariate Logistic regression showed that the KL-6(OR = 1.002, 95% CI= [1.000, 1.003], P = 0.021), DLCO%(OR = 0.860, 95% CI= [0.786, 0.942], P = 0.001), and bilateral lung SUVmax (per 10 units) (OR = 1.492, 95% CI= [1.177, 1.890], P = 0.001) were associated with CTD-ILD.