Association between combined predictor factors and emPHasis-10 scores (n=126)
| Variable | Category/term | Coefficient (95% CI)* | P value |
| Dyspnoea-12† | Linear term | 4.5 (3.4 to 5.6) | <0.001 |
| Squared term | −0.4 (−0.6 to −0.2) | ||
| FSS† | – | 1.7 (1.3 to 2.2) | <0.001 |
| HADS-Anxiety | – | 0.3 (0.1 to 0.5) | 0.001 |
| HADS-Depression | – | 0.5 (0.3 to 0.8) | <0.001 |
| WHO FC (patient reported) | FC I/II | 0 | <0.001 |
| FC III | 2.5 (1.2 to 3.8) | ||
| FC IV | 2.9 (1.0 to 4.7) |
*Adjusted for diagnosis, age and gender.
†Regression coefficients reported for a 5-unit increase in predictor variable.
FSS, Fatigue Severity Scale; HADS, Hospital Anxiety and Depression Scale; WHO FC, WHO functional class.