108 af de inkluderede patienter havde diagnosen primær pulmonal hypertension, 95 havde sekundær pulmonal hypertension, hvoraf 56 var forbundet med kronisk tromboembolisk sygdom, 34 med bindevævssygdom (herunder CREST og sclerodermia) og 4 betragtedes som relateret til appetitdæmpende middel.
108 of the patients included were diagnosed with primary pulmonary hypertension, 95 were diagnosed with secondary pulmonary hypertension of which 56 were associated with chronic thromboembolic disease, 34 with connective tissue disease (including CREST and scleroderma) and 4 were considered appetite suppressant drug related.