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Interstitial lung disease (ILD) carries a risk for severe pneumonia in patients with rheumatoid arthritis (RA). Bronchiectasis, another risk of severe pneumonia, has not been well elucidated in RA. We investigated the types of respiratory diseases in RA and correlated them to severe pneumonia during the course of treatment using biologic DMARDs (bDMARDs), with special attention to bronchiectasis and ILD. RA patients were examined by computed tomography before starting bDMARDs and divided into three groups normal, bronchiectasis and ILD