Table 4.
Effects of intervention on hypothesised mediators, at 4 weeks or 4 months, with adjustment for baseline values (coefficients and standard errors from random-effects regressions)
| MEDIATOR (range) | Four week mediators | Six month mediators | ||||
|---|---|---|---|---|---|---|
| n | b (SE) | p-value | n | b (SE) | p-value | |
| PA self-efficacy(1–5) | 597 | 0·09 (0·08) | 0·31 | |||
| Intentions (1–7) | 595 | 0·29 (0·13) | 0·02 | |||
| Outcome expectations (1–5) | 528 | −0·03 (0·06) | 0·58 | |||
| Financial motivation (1–7) | 600 | 0·11 (0·15) | 0·46 | |||
| Planning (1–4) | 575 | 0·02 (0·05) | 0·75 | 436 | 0·08 (0·06) | 0·18 |
| Social norms (1–7) | 576 | 0·23 (0·08) | < 0·01 | 434 | 0·10 (0·12) | 0·42 |
| Identified regulation (1–5) | 598 | 0·14 (0·06) | 0·01 | 459 | 0·11 (0·05) | 0·02 |
| Integrated regulation (1–5) | 595 | 0·23 (0·07) | < 0·01 | 454 | 0·26 (0·08) | < 0·01 |
| Intrinsic motivation (1–5) | 599 | 0·18 (0·06) | < 0·01 | 456 | 0·17 (0·06) | < 0·01 |
| Habit (1–5) | 448 | 0·48 (0·12) | < 0·01 | |||
| Workplace norms (1–5) | 456 | 0·13 (0·07) | 0·06 | |||
| Recovery self-efficacy (1–4) | 457 | 0·02 (0·06) | 0·80 | |||
| Maintenance self-efficacy (1–4) | 459 | −0·02 (0·09) | 0·80 | |||
| Outcome satisfaction (1–5) | 427 | 0·03 (0·05) | 0·56 | |||
PA Physical activity, SE Standard error
NB. All questionnaire items were scaled so that lower values indicated lower levels of the mediator/outcome. Results are adjusted for strata, season, baseline pedometer steps/day and baseline mediator values with cluster-adjusted standard errors and p-values (b = coefficient for group assignment variable, i.e. Intervention versus Control)