Differences between included and excluded participants for each of the study variables
| Included* | Excluded | p | |||
| n | Mean (SD) | n | Mean (SD) | ||
| Sex (% mothers) | 911 | 74.5% (0.44) | 325 | 80.6% (0.40) | 0.03 |
| Children in household | 911 | 2.15 (0.94) | 130 | 1.95 (1.00) | 0.02 |
| IMD score | 911 | 13.96 (11.93) | 257 | 18.54 (15.09) | <0.001 |
| Amotivation | 911 | 0.20 (0.48) | 148 | 0.46 (0.79) | <0.001 |
| External regulation | 911 | 0.27 (0.47) | 145 | 0.36 (0.67) | 0.04 |
| Introjected regulation | 911 | 1.27 (1.01) | 151 | 1.16 (1.07) | 0.23 |
| Identified regulation | 911 | 2.69 (0.96) | 144 | 2.32 (1.08) | <0.001 |
| Intrinsic motivation | 911 | 2.61 (1.09) | 143 | 2.23 (1.14) | <0.001 |
| Intentions | 911 | 3.05 (2.03) | 107 | 3.11 (2.07) | 0.76 |
| Parent MVPA | 911 | 49.98 (24.42) | 251 | 48.75 (26.10) | 0.49 |
| Child MVPA | 895 | 67.65 (20.32) | 304 | 67.36 (21.91) | 0.84 |
*Included participants were parents with complete data for each of the study variables, child MVPA was treated as a separate variable.
IMD, Indices of Multiple Deprivation; MVPA, moderate-to-vigorous-intensity physical activity.