RT Journal Article SR Electronic T1 Fatigue in patients with idiopathic pulmonary fibrosis (IPF) from the pooled pirfenidone (PFD) Phase III trials JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP PA4875 DO 10.1183/1393003.congress-2017.PA4875 VO 50 IS suppl 61 A1 Ulrich Costabel A1 Carlo Albera A1 Marlies S. Wijsenbeek A1 Joao A. de Andrade A1 Wendi R. Mason A1 Steven D. Nathan A1 Joseph D. Zibrak A1 Maria L. Padilla A1 Frank Gilberg A1 Ute Petzinger A1 Klaus-Uwe Kirchgaessler A1 Lisa H. Lancaster YR 2017 UL http://erj.ersjournals.com/content/50/suppl_61/PA4875.abstract AB Background: Fatigue is often reported as an adverse event (AE) in patients (pts) with IPF treated with PFD but is also an important symptom of IPF.Objective: To compare fatigue in pts with IPF receiving PFD or placebo (PBO) in the Phase III CAPACITY and ASCEND trials.Methods: All pts who received PFD 2403 mg/day (n=623) or PBO (n=624) from the pooled Phase III trials were analyzed to describe the frequency and time course of fatigue AEs using descriptive statistics and time-to-event analyses.Results: Fatigue AEs occurred in 162 pts treated with PFD (26.0%) and 119 with PBO (19.1%). Moderate and severe fatigue occurred in 67 (10.8%) and 7 (1.1%) PFD pts vs 26 (4.2%) and 5 (0.8%) PBO pts, respectively. Dose modification occurred following 17.6% of fatigue AEs with PFD (39/222) vs 7.0% (10/142) with PBO. Fatigue occurred sooner after randomization (median [IQR], 30.5 [13.0-231.0] vs 36.0 [7.0-168.0] days) and for shorter duration (64.0 [7.0-214.5] vs 109.5 [24.0-267.0] days) in the PFD vs PBO groups, respectively (Figure). There were no meaningful differences in baseline characteristics between pts with fatigue vs those without in either PFD or PBO groups.Conclusions: Fatigue AEs tended to be more frequent, shorter and slightly more severe in pts with IPF treated with PFD vs PBO. A fatigue questionnaire to quantitatively assess fatigue in pts with IPF might be considered in future IPF trials.