KORAIL (Korean RA-ILD) prospective cohort study of CT and biomarkers showed 35% ILD progressed over 3 yrs. Higher baseline KL-6 (HR 1.37) & hSP-D (1.51) levels assoc w/ progression. Increasing KL-6 at 1 yr showed the greatest progression (∆KL-6: HR 2.0) https://t.co/efowyCp1qu https://t.co/JVd7sRKzVF