A list of measures included in the exploratory factor analysis model
| 1. Sex | 14. mMRC |
| 2. Age | 15. EQ-5D-5L – Index |
| 3. BMI | 16. FACIT – Fatigue Scale |
| 4. Dyspnea-12 – Affect | 17. Average severity of pain |
| 5. Dyspnea-12 – Physical | 18. CAT |
| 6. MDP_A2_Anxiety | 19. MDP_A2_Depression |
| 7. MDP_A2_Afraid | 20. MDP_A1_Breathing Discomfort |
| 8. MDP_A2_Angry | 21. MDP_SQ1_Physical Effort |
| 9. MDP_A2_Frustrated | 22. MDP_SQ2_Hunger |
| 10. Breathlessness at rest | 23. MDP_SQ3_Tightness |
| 11. Breathlessness mean | 24. MDP_SQ4_Mental Effort |
| 12. HADS – Depression | 25. MDP_SQ5_Hypernoea |
| 13. HADS – Anxiety |
BMI: body mass index; MDP: multidimensional dyspnea profile; SQ: sensory dimension; A2: emotional response domain; HADS: hospital anxiety and depression scale; FACIT: functional assessment of chronic illness therapy – fatigue scale; mMRC: modified Medical Research Council breathlessness scale; CAT: COPD assessment test; EQ-5D–5L: EuroQol five dimensions – five levels.