This post hoc analysis of pooled data from 21 clinical trials in the tofacitinib clinical trial programme highlights the importance of identifying known risk factors of RA-interstitial lung disease (ILD) in clinical practice.Citera, et al. investigated incidence rates of ILD – an extra-articular manifestation of RA – in patients with RA, receiving tofacitinib 5 or 10 mg BID and sort to identify potential risk factors for ILD in these patients....