Fig. 3From: Sildenafil dosed concomitantly with bosentan for adult pulmonary arterial hypertension in a randomized controlled trialMean (±SE) change from baseline to week 12 in 6MWD by aetiology (a), baseline 6MWD (b), and prior bosentan therapy duration (c). Last observations were carried forward. 6MWD=6-minute walk distance; APAH-CTD=connective tissue disease-associated PAH; IPAH/HPAH=idiopathic/heritable PAH; LS=least squares; PAH=pulmonary arterial hypertensionBack to article page