Effect of treatment on New York Heart Association(NYHA) functional class in idiopathic and nonidiopathic pulmonary arterial hypertension (PAH)
| Idiopathic PAH# | Nonidiopathic PAH¶ | |||
| Baseline | Post-treatment | Baseline | Post-treatment | |
| NYHA n | ||||
| I | 0 | 1 | 0 | 0 |
| II | 13 | 26 | 3 | 5 |
| III | 27 | 12 | 11 | 12 |
| IV | 0 | 1 | 3 | 0 |
In idiopathic PAH, treatments included oral bosentan (n = 28), intravenous epoprostenol (n = 9) and both (n = 3). In nonidiopathic PAH, treatments included oral bosentan (n = 10), intravenous epoprostenol (n = 5) and inhaled iloprost (n = 2). #: n = 40; ¶: n = 17.