Baseline characteristics
| Characteristic | Level | Intervention (N=274) | Control (N=277) |
| Age: mean (SD) (n) | 64.38 (9.8) (274) | 64.07 (10.64) (277) | |
| Sex | Female | 117 (42.7%) | 114 (41.2%) |
| Male | 157 (57.3%) | 163 (58.8%) | |
| FEV1: mean (SD) (n) | 80.90 (21.65) (273) | 81.63 (20.51) (276) | |
| Smoking pack-years: mean (SD) (n) | 45.18 (23.84) (274) | 45.99 (24.4) (277) | |
| Smoking status | Ex-smoker | 168 (61.3%) | 148 (53.4%) |
| Current | 106 (38.7%) | 129 (46.6%) | |
| Comorbidities | Cardiovascular | 100 (36.5%) | 115 (41.5%) |
| Respiratory | 90 (32.8%) | 89 (32.1%) | |
| Psychiatric | 44 (16.1%) | 41 (14.8%) | |
| Diabetes | 28 (10.2%) | 35 (12.6%) | |
| Other | 92 (33.6%) | 92 (33.2%) | |
| Respiratory consultations from 12 months to baseline: mean (SD) (n) | 0.86 (1.62) (269) | 0.76 (1.25) (273) | |
| All consultations from 12 months to baseline: mean (SD) (n) | 9.06 (7.49) (270) | 9.11 (7.70) (273) | |
| Accommodation | Own your home | 204 (74.5%) | 212 (76.5%) |
| Rent your home | 50 (18.2%) | 33 (11.9%) | |
| Other (please specify below) | 20 (7.3%) | 22 (7.9%) | |
| Missing | 0 | 10 (3.6%) | |
| Education | Year 11 or below | 86 (31.4%) | 89 (32.1%) |
| Year 12 or equivalent | 40 (14.6%) | 38 (13.7%) | |
| Trade/apprenticeship | 29 (10.6%) | 39 (14.1%) | |
| Tertiary certificate/diploma | 49 (17.9%) | 57 (20.6%) | |
| Undergraduate university degree | 24 (8.8%) | 17 (6.1%) | |
| Postgraduate university degree | 17 (6.2%) | 12 (4.3%) | |
| Other (please specify) | 26 (9.5%) | 17 (6.1%) | |
| Missing | 3 (1.1%) | 8 (2.9%) | |
| Living arrangements | On your own | 70 (25.5%) | 70 (25.3%) |
| With a partner/spouse | 166 (60.6%) | 166 (59.9%) | |
| With other family | 32 (11.7%) | 28 (10.1%) | |
| Other (please specify below) | 6 (2.2%) | 5 (1.8%) | |
| Missing | 0 | 8 (2.9%) | |
| Occupation (more than one can apply) | Retired | 85 (31.0%) | 98 (35.4%) |
| Caring for dependent relative | 14 (5.1%) | 16 (5.8%) | |
| Voluntary worker | 20 (7.3%) | 14 (5.1%) | |
| Unemployed | 52 (19.0%) | 63 (22.7%) | |
| Student | 8 (2.9%) | 3 (1.1%) | |
| Looking after home/family | 43 (15.7%) | 48 (17.3%) | |
| Disabled/unable to work | 21 (7.7%) | 22 (7.9%) |