| 3 months participants (n = 2309) | 12 months participants (n = 4676) | ||||
---|---|---|---|---|---|---|
 | Respondents N = 1711 | Non-respondents N = 598 | p-value^ | Respondents N = 3065 | Non-respondents N = 1611 | p-value^ |
Gender (% men) | 30.3 | 34.9 | 0.07 | 30.9 | 33.1 | 0.15 |
Age (% > 50 years) | 50.2 | 68.4 | 0.00 | 49.1 | 67.4 | 0.00 |
Education (% university or diploma holders) | 57.5 | 51.8 | 0.02 | 58.1 | 54.7 | 0.05 |
SES (% affluent) | 43.8 | 48.6 | 0.06 | 44.1 | 47.4 | 0.12 |