Comparison of parameters between iron-deficient and iron-replete patients with IPAH
| Characteristics | Iron-deficient | Iron-replete | p Value |
| Number of patients | 26 | 59 | – |
| Age, years | 45.5 (15.4) | 55.2 (16.1) | 0.02 |
| RAP, mm Hg | 9.5 (5.0) | 9.5 (5.6) | 0.95 |
| Mean PA pressure, mm Hg | 55.9 (11.2) | 50.3 (14.0) | 0.06 |
| CI, l/m2 | 2.1 (0.6) | 1.9 (0.6) | 0.39 |
| Pulmonary vascular resistance, dynes.cm−5 | 939 (408) | 1000 (486) | 0.55 |
| 6MWD, m | 320 (122) | 320 (115) | 0.97 |
| Proportion ANA-positive | 3/26 (11.5%) | 11/59 (18.6%) | 0.54 |
| Proportion with saturation <95% on room air | 12/26 (46.2%) | 23/59 (40.0%) | 0.79 |
| Proportion treated with ERAs | 13/26 (50.0%) | 17/59 (28.8%) | 0.09 |
ANA, antinuclear antibody; CI, cardiac index; ERA, endothelin receptor antagonist; IPAH, idiopathic pulmonary arterial hypertension; 6MWD, 6-minute walking distance; PA, pulmonary artery; RAP, right atrial pressure.