Table 1 Socio-demographic and environmental characteristics of participants
Conceptual domain | Variable | Level | n (%) |
|---|---|---|---|
Potential confounders | Sex | Female | 1900 (55%) |
Male | 1556 (45%) | ||
Age (years) | 18-34 | 791 (23%) | |
35-49 | 801 (23%) | ||
50-64 | 991 (29%) | ||
>65 | 836 (24%) | ||
Ethnicity | White | 3239 (95%) | |
Non-White | 178 (5%) | ||
Any child under 16 | No | 2715 (79%) | |
Yes | 701 (21%) | ||
Highest educational qualification | Degree | 1372 (41%) | |
A-level or equivalent | 599 (18%) | ||
GCSE or equivalent | 629 (19%) | ||
None or other | 756 (23%) | ||
Site | Southampton | 1108 (32%) | |
Cardiff | 1109 (32%) | ||
Kenilworth | 1246 (36%) | ||
Urban/rural status | Urban | 3305 (95%) | |
Rural | 158 (5%) | ||
Potential confounders or mediators | Employment status | Full-time | 1403 (41%) |
Part-time | 475 (14%) | ||
Student | 222 (7%) | ||
Retired | 937 (28%) | ||
Home duties | 145 (4%) | ||
Sick/unemployed/other | 212 (6%) | ||
Annual household income | >£40,000 | 1056 (37%) | |
£20,001-40,000 | 934 (33%) | ||
≤£20,000 | 876 (31%) | ||
Cars per adult in household | No cars | 504 (15%) | |
<1 car per adult | 1282 (37%) | ||
≥1 cars per adult | 1638 (48%) | ||
Any adult bike in household | No | 1375 (42%) | |
Yes | 1883 (58%) |