Baseline characteristics of study cohort
| Gender, n (%) | |
| Female | 529 (52.4%) |
| Male | 481 (47.6%) |
| Age (years), median (p25, p75) | 52(37 67) |
| Social grade, n (%) | |
| A/B/C1 | 530 (52.5%) |
| C2/D/E | 380 (47.5%) |
| Welsh region, n (%) | |
| Mid and West Wales | 193 (19.1%) |
| North Wales | 209 (20.7%) |
| Cardiff | 133 (13.2%) |
| South Wales Central | 69 (6.8%) |
| South Wales East | 235 (23.3%) |
| South Wales West | 171 (16.9%) |
| Working status, n (%) | |
| No | 524 (51.9%) |
| All workers (net) | 486 (48.1%) |
p25 – lower quartile; p75 – upper quartile.