Macitentan Use in an Idiopathic Pulmonary Fibrosis Clinical Study

The study included two treatment periods: Period 1 (fixed duration) from randomization up to the primary endpoint evaluation (Month 12 or earlier in case of premature discontinuation of study drug) and Period 2 (variable duration) from the primary endpoint evaluation visit up to the end of study (EOS). EOS occurred when the last patient randomized and not prematurely discontinued completed Period 1.