Factors associated with dropout
| Variable | No dropout (n=126) | Dropout (n=59) | P value |
| Mean age, years (SD) | 55.5 (13.7) | 57.0 (11.6) | 0.47 |
| Gender, n (%) | 0.08 | ||
| Male | 35 (28) | 24 (41) | |
| Female | 91 (72) | 35 (59) | |
| PH diagnosis, n (%) | 0.69 | ||
| Idiopathic PH | 49 (39) | 17 (30) | |
| CTEPH | 14 (11) | 6 (11) | |
| CTD | 19 (15) | 13 (23) | |
| Congenital PH | 24 (19) | 11 (20) | |
| Other | 20 (16) | 12 (16) | |
| Median Dyspnoea-12 score (IQR) | 9 (2–16) | 14 (5–19) | 0.03 |
| Median FSS score (IQR) | 5.2 (3.8–6.2) | 5.6 (4.6–6.6) | 0.14 |
| Mean HADS-Anxiety score (SD) | 6.8 (4.5) | 7.9 (5.0) | 0.16 |
| Mean HADS-Depression score (SD) | 5.4 (3.6) | 7.3 (4.1) | 0.002 |
| Mean MOS-Sleep Index score (SD) | 37.7 (19.1) | 43.2 (19.0) | 0.08 |
| WHO FC, n (%) | 0.02 | ||
| Class I/II | 53 (43) | 15 (27) | |
| Class III | 52 (43) | 23 (42) | |
| Class IV | 17 (14) | 17 (31) |
CTD, connective tissue disease; CTEPH, chronic thromboembolic pulmonary hypertension; FSS, Fatigue Severity Scale; HADS, Hospital Anxiety and Depression Scale; MOS, Medical Outcomes Study; PH, pulmonary hypertension; WHO FC, WHO functional class.