| Controls (n = 21) | IPAH (n = 20) | SSc–nonPAH (n = 19) | SSc–PAH (n = 21) | ||
| PAH rest (n = 13) | PAH exercise (n = 8) | ||||
| Age, year (SD) | 37.7 (10.7) | 46.4 (12.0) | 56.0 (10.7) | 63.1 (15.6) | 62.7 (15.6)* |
| Female (%) | 21 (100) | 19 (86) | 18 (95) | 13 (100) | 7 (88)† |
| RP (%) | 0 | 1 (5) | 17 (90) | 13 (100) | 8 (100)‡ |
| Duration of RP, year (95% CI) | NA | 27 (NA) | 6.3 (4.0 to 11.9) | 15.3 (10.9 to 21.3) | 6.6 (2.7 to 16.3)§ |
| Good/moderate image quality | 20/1 | 19/1 | 15/4 | 12/1 | 5/3† |
IPAH, idiopathic pulmonary arterial hypertension; NA, not applicable; PAH, pulmonary arterial hypertension; RP, Raynaud’s phenomenon; SSC, systemic sclerosis; SSc–nonPAH, SSc without PAH; SSc–PAH, SSc with PAH.
*Differences significant (p<0.05) between categories.
†Differences not significant between categories.
‡Difference not significant between SSc-non PAH and SSc–PAH.
§Difference significant (p<0.05) between SSc–PAH at rest and SSc-nonPAH; difference not significant between SSc–PAH at rest and SSc–PAH during exercise.