RT Journal Article SR Electronic T1 Design of the PF-ILD trial: a double-blind, randomised, placebo-controlled phase III trial of nintedanib in patients with progressive fibrosing interstitial lung disease JF BMJ Open Respiratory Research JO BMJ Open Resp Res FD British Thoracic Society SP e000212 DO 10.1136/bmjresp-2017-000212 VO 4 IS 1 A1 Kevin R Flaherty A1 Kevin K Brown A1 Athol U Wells A1 Emmanuelle Clerisme-Beaty A1 Harold R Collard A1 Vincent Cottin A1 Anand Devaraj A1 Yoshikazu Inoue A1 Florence Le Maulf A1 Luca Richeldi A1 Hendrik Schmidt A1 Simon Walsh A1 William Mezzanotte A1 Rozsa Schlenker-Herceg YR 2017 UL http://bmjopenrespres.bmj.com/content/4/1/e000212.abstract AB 600 patients aged ≥18 years will be randomised in a 1:1 ratio to nintedanib or placebo. Patients with diagnosis of IPF will be excluded. The study population will be enriched with two-thirds having a usual interstitial pneumonia-like pattern on HRCT. The primary endpoint is the annual rate of decline in forced vital capacity over 52 weeks. The main secondary endpoints are the absolute change from baseline in King’s Brief Interstitial Lung Disease Questionnaire total score, time to first acute interstitial lung disease exacerbation or death and time to all-cause mortality over 52 weeks.Ethics and dissemination The trial is conducted in accordance with the Declaration of Helsinki, the International Conference on Harmonisation Tripartite Guideline for Good Clinical Practice (GCP) and Japanese GCP regulations.Trial registration number NCT02999178.