Patient characteristics and diagnoses
| Patients | 171 |
| Male | 97 (56.7) |
| Age years (mean (range)) | 75.9 (42.8–91.8) |
| Ex-smoker | 134 (78.4) |
| Lives alone | 45 (26.3) |
| Lives in nursing home | 19 (11.1) |
| Primary respiratory diagnosis | |
| COPD | 142 (83.0) |
| Pulmonary fibrosis | 14 (8.9) |
| Bronchiectasis | 7 (4.1) |
| Coexisting second respiratory condition | 107 (62.6) |
| Comorbidities (mean (range)) | 6.8 (0–14) |
| Anxiety | 65 (38.0) |
| Depression | 51 (29.8) |
| Cardiac disease | 119 (69.6) |
| Cardiac comorbidities (mean (range)) | 1.5 (0–5) |
| Pulmonary function n=169 | |
| FEV1 L (median (IQR)) | 0.8 (0.6–1.1) |
| FEV1 % pred (median (IQR)) | 41.5 (32.0–55.8) |
| FVC L (median (IQR)) | 2.2 (1.7–2.7) |
| FVC % pred (median (IQR)) | 83 (65.3–101.8) |
| DLCO (median (IQR)) | 8 (6–10) |
| DLCO % pred (median (IQR)) | 37.5 (29.0–48.0) |
| 6MWD on air m (median (IQR)) n=163 | 80 (0–222.5) |
| PaO2 mmHg (median (IQR)) n=115 | 57.1 (51.1–64.0) |
| PaCO2 mmHg (median (IQR)) n=115 | 45.0 (39.3–50.9) |
| Domiciliary oxygen use | 111 (64.9) |
| mMRC Dyspnoea scale score (median (IQR)) | 4 (2–4) |
| mMRC Dyspnoea scale score 1–2 | 48 (26.9) |
| mMRC Dyspnoea scale score 3–4 | 123 (73.1) |
Data are presented as n or n (%), unless otherwise stated. COPD: chronic obstructive pulmonary disease; FEV1: forced expiratory volume in 1 s; IQR: interquartile range; FVC: forced vital capacity; DLCO: diffusing capacity of the lung for carbon monoxide; 6MWD: 6-min walk distance; PaO2: arterial oxygen tension; PaCO2: arterial carbon dioxide tension; mMRC: modified Medical Research Council.