Baseline characteristics (%) according to whether or not data available at all waves
| Completers1-150 | Non-completers1-151 | All | p Value | |
| Number of subjects | 3189 | 3522 | 6711 | |
| Age group | <0.00011-152 | |||
| 16– | 7.5 | 13.7 | 10.7 | |
| 25– | 17.8 | 22.4 | 20.2 | |
| 35– | 19.6 | 17.0 | 18.2 | |
| 45– | 19.4 | 15.4 | 17.3 | |
| 55– | 17.1 | 14.7 | 15.8 | |
| 65– | 18.6 | 16.8 | 17.6 | |
| Gender (% male) | 42.5 | 44.7 | 43.6 | 0.07 |
| Children (% yes) | 32.7 | 28.0 | 30.3 | <0.001 |
| Social grade | 0.00011-152 | |||
| AB | 22.6 | 18.4 | 20.3 | |
| C1 | 29.0 | 31.0 | 30.1 | |
| C2 | 21.8 | 19.9 | 20.8 | |
| DE | 26.6 | 30.7 | 28.7 | |
| Car use (% yes) | 77.2 | 67.7 | 72.1 | <0.001 |
| Ethnicity (% non-white) | 3.4 | 7.2 | 5.4 | <0.001 |
| Home ownership (% owned/being bought) | 79.8 | 66.7 | 73.0 | <0.001 |
| Physical limitation (% yes) | 26.2 | 25.4 | 25.8 | 0.49 |
| Barriers (% yes) | 74.8 | 73.2 | 74.0 | 0.16 |
| Knowledge | 0.30 | |||
| 5 times 30 mins | 14.7 | 13.5 | 14.1 | |
| 3 times 20 mins | 10.1 | 10.7 | 10.4 | |
| Neither | 75.1 | 75.8 | 75.5 | |
| Psychological benefits (% yes) | 63.9 | 63.2 | 63.5 | 0.57 |
| Physical benefits (% yes) | 82.6 | 80.4 | 81.5 | 0.02 |
| Readiness to change | 0.481-152 | |||
| 1 (low) | 20.4 | 20.9 | 20.7 | |
| 2 | 19.3 | 20.0 | 19.6 | |
| 3 | 20.6 | 20.0 | 20.3 | |
| 4 | 21.9 | 21.8 | 21.9 | |
| 5 (high) | 17.7 | 17.3 | 17.5 | |
| Activity (%) | 0.151-152 | |||
| Vigorous | 12.2 | 13.7 | 13.0 | |
| Moderate | 19.2 | 17.2 | 18.1 | |
| Light | 44.8 | 40.8 | 42.7 | |
| Sedentary | 23.9 | 28.3 | 26.2 |