| Parameter | Value |
| Patients with PAH | 10 |
| Age, years | 56.4 (31–79) |
| Disease duration, years | 10.2 (2–24) |
| FVC/DLCO ratio | 1.6 (1.37–2.13) |
| ANA (n) | 10 |
| SCL70 (n) | 2 |
| ACA (n) | 2 |
Values are mean (range).
ACA, anticentromere antibodies; ANA, antinuclear antibodies; DLCO, CO diffusion; FVC, forced vital capacity; PAH, pulmonary arterial hypertension.