Associations with RA-BR (n=57 cases) compared to RA-no lung disease controls (n=36) ⬆️⬆️⬆️RF level (OR 4.4) ⬆️⬆️ ACPA level (OR 3.5) ⬆️older age at RA onset (OR 1.37 per 10 years) ⬇️ BMI (OR 0.94 per kg/m2) (i.e., higher risk in underweight) 🚫 associations: sex, smoking pk-yrs