Fig. 2From: Sildenafil dosed concomitantly with bosentan for adult pulmonary arterial hypertension in a randomized controlled trialMean (±SE) change from baseline to week 12 and week 64 in 6MWD. Last observations were carried forward. Patients are shown by their randomization in the 12-week double-blind study; however, in the 52-week open-label extension (after week 12), all patients received sildenafil and bosentan concomitant therapy. 6MWD=6-minute walk distanceBack to article page