Participant characteristics—stages 3 and 4—item-reduction and preliminary validation
| COPD (n=203) | |
|---|---|
| Male n (%) | 128 (63.1) |
| Age (years) | 64.8 (7.5) |
| BMI mean (SD) | 27.6 (5.2) |
| Current smokers n (%) | 66 (32.5) |
| Pack years median (IQR) | 41 (27 to 57) |
| COPD duration in years (SD) | 7.5 (5.3) |
| MOS mean (SD) | |
| Sleep disturbance | 39.8 (25.2) |
| Short of breath/headache | 26.2 (27.9) |
| Sleep adequacy | 52.3 (27.4) |
| Sleep problem index II | 41.7 (20.0) |
| FACIT-F mean (SD) | 31.5 (13.1) |
| HADS mean (SD) | |
| Anxiety | 7.4 (4.5) |
| % with HADS anxiety score >7 | 48.6 |
| Depression | 5.9 (4.3) |
| % with HADS depression score >7 | 35.4 |
| SGRQ-C mean (SD) | |
| Total | 51.9 (20.9) |
| Symptom | 59.6 (19.5) |
| Activity | 66.2 (27.7) |
| Impact | 40.1 (22.8) |
| mMRC dyspnoea scale n (%) | |
| 0 | 20 (9.9) |
| 1 | 64 (31.5) |
| 2 | 40 (19.7) |
| 3 | 56 (27.6) |
| 4 | 23 (11.3) |
| Lung function | |
| FEV1% predicted (%) | 56.6 (18.6) |
| FEV/FVC (%) | 48.3 (13.4) |
| GOLD n(%) | |
| Grade 1 | 28 (13.8) |
| FEV1% predicted (%) mean (SD) Min and Max | 87.7 (5.6) Min 80.0-Max 100.1) |
| Grade 2 | 83 (40.9) |
| FEV1% predicted (%) mean (SD) Min and Max | 64.0 (7.9) Min 51.1-Max 78.9) |
| Grade 3 | 50 (24.6) |
| FEV1% predicted (%) mean (SD) Min and Max | 43.3 (4.5) Min 34.2-Max 49.9) |
| Grade 4 | 15 (7.4) |
| FEV1% predicted (%) mean (SD) Min and Max | 23.9 (3.4) Min 21.9-Max 28.6) |
BMI, Body Mass Index; FACIT-F, Functional Assessment of Chronic Illness Therapy Fatigue Scale; GOLD, Global Initiative for Chronic Obstructive Lung Disease; HADS, Hospital Anxiety and Depression Scale; mMRC, modified Medical Research Council; MOS, Medical Outcomes Study; SGRQ-C, St George's Respiratory Questionnaire-C.