Det primære effekt - endpoint, der var defineret for dette studie, var et samlet responskriterium bestående af en bedring af motionskapaciteten (6 minutters gangtest) efter 12 uger med mindst 10% i forhold til baseline, og en bedring med mindst én NYHA- klasse efter 12 uger i forhold til baseline, samt hverken forværring af den pulmonale hypertension eller død inden for de 12 uger.
The primary efficacy endpoint defined for this study, was a combined response criterion consisting of improvement in exercise capacity (6 minute walk test) at 12 weeks by at least 10% versus baseline, and improvement by at least one NYHA class at 12 weeks versus baseline, and no deterioration of pulmonary hypertension or death at any time before 12 weeks.