Rheumatoid Arthritis-Associated Interstitial Lung Disease: Characterization of Lung Disease Progression

Inclusion Criteria: 1. Consecutive adult patients (aged \>18 years) meeting RA diagnostic criteria in accordance with ACR 2010 2. Presence of interstitial lung disease 2.1 ILD Definition: presence of interstitial alterations in HRCT associated to functional derangements and/or symptoms 3. Patient agrees with having follow-up visits every 6 months for 2 years Exclusion Criteria: 1. Pregnancy or intending to become pregnant 2. Overlap with other diseases that occurs with ILD (other collagenoses, vasculitis, inflammatory bowel disease) 3. Presence of advanced ILD, characterized by: a. Dyspnea rated as modified Medical Research Council 4 (mMRC4) on routine visit 4. Presence of significant Arterial Pulmonary Hypertension: 1. Evidence of Right ventricular failure evidence by echocardiography 2. Previous right chamber catheterism showing cardiac index \< 2 liters/min/m² 5. Significant co-morbidity impacting respiratory system (e.g., congestive heart failure, lung neoplasm, active tuberculosis)