KL-6 values ​​were also higher in patients with UIP compared to the other HRCT patterns (980 ± 120 vs. 660 ± 95 U/mL, p = 0.040) and in patients with lesion extension> 15% (1836 ± 547 vs. 852 ± 120 U / mL, p = 0.031) as compared to patients with milder disease. Here, MUC1 is linked to idiopathic pulmonary fibrosis.