Introduction
Rheumatoid arthritis (RA) is a systemic immune disease with arthritis as its main manifestation and can involve multiple organs and systems. The prevalence of RA is estimated to range between 0.5% and 1% globally, with a female-to-male ratio of approximately 3:1. It is most commonly diagnosed in individuals between the ages of 30 and 60 years, with a higher incidence in women compared to men.1 Interstitial lung disease (ILD) is one of the main manifestations of RA involving the lungs, and it is one of the main causes of exacerbation and even death in RA patients. The prevalence of RA-associated interstitial lung disease (RA-ILD) varies significantly depending on the detection methods and the cohorts studied. Studies employing high-resolution computed tomography (HRCT) or lung biopsy often report a higher…