Demographic profile of study participants
| Age years | 70.28±8.46 |
| FEV1 L | 1.39±0.62 |
| FVC L | 2.79±0.71 |
| Sex | |
| Male | 19 (53) |
| Female | 17 (47) |
| Marital status | |
| Married | 24 (66.7) |
| Widowed | 6 (16.7) |
| Partner | 1 (2.8) |
| Divorced | 3 (8.3) |
| Single | 2 (5.6) |
| Employment status | |
| Retired | 30 (83.3) |
| Working | 5 (13.9) |
| Long-term sick leave | 1 (2.8) |
| MRC grade | |
| 2 | 20 (55.6) |
| 3 | 9 (25.0) |
| 4 | 4 (11.1) |
| 5 | 3 (8.3) |
| Living with | |
| Partner/spouse | 25 (69.4) |
| Alone | 8 (22.2) |
| Family | 3 (8.3) |
Data are presented as mean±sd or n (%). FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; MRC: Medical Research Council dyspnoea scale.