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Fig. 4 | BMC Pulmonary Medicine

Fig. 4

From: Efficacy of 1, 5, and 20 mg oral sildenafil in the treatment of adults with pulmonary arterial hypertension: a randomized, double-blind study with open-label extension

Fig. 4

Mean change from baseline in 6MWD. Legend: Mean (SE) overall change from double-blind baseline in 6MWD in double-blind (week 12) and open-label (week 24) phases of the study (a), and change from baseline to week 12 in 6MWD by baseline 6MWD (b). All patients received sildenafil 20 mg TID in the open-label phase of the study (weeks 13–24). 6MWD = 6-minute walk distance; TID = 3 times daily

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BMC Pulmonary Medicine

ISSN: 1471-2466

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