Table 5.
Action theory test, conceptual theory test and significance of the mediated effect on pedometer-assessed step counts
| Action theory | Conceptual theory | Direct effect | Indirect effect | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Hypothesized mediators | Time (weeks) | A (SE) | p-value | B (SE) | p-value | C’ (SE) | p-value | AB (SE) | 95 % CI | AB/(C’ + AB) [Proportion (%) |
| Self-efficacya | 8 | 0.22 (0.13) | 0.08 | −66.86 (498.07) | 0.89 | 1944.66 (588.37) | 0.001* | −14.86 (107.57) | −300.97 to 157.42 | −0.01 (−1%) |
| Self-efficacyb | 20 | 0.31 (0.15) | 0.05* | 170.93 (608.68) | 0.78 | 1652.18 (797.21) | 0.042* | 52.15 (166.17) | −200.98 to 514.51 | 0.03 (3%) |
| Behavioral goalc | 8 | 9.12 (4.14) | 0.03* | 5.44 (15.93) | 0.73 | 1873.05 (611.42) | 0.003* | 49.56 (133.97) | −170.91 to 382.83 | 0.03 (3%) |
| Behavioral goald | 20 | 13.15 (5.01) | 0.01* | 30.26 (19.19) | 0.12 | 1396.80 (826.62) | 0.10 | 397.88 (219.14) | 81.50 to 1025.48* | 0.22 (22%) |
| Outcome expectationsa | 8 | 0.25 (0.12) | 0.04* | −168.47 (528.22) | 0.75 | 1981.44 (591.81) | 0.001* | −41.42 (93.61) | −343.99 to 80.66 | −0.02 (−2%) |
| Outcome expectationsb | 20 | 0.24 (0.14) | 0.09 | 659.94 (664.96) | 0.32 | 1545.46 (786.64) | 0.05* | 157.74 (141.27) | −35.94 to 563.70 | 0.09 (9%) |
| Impedimentsa | 8 | 0.14 (0.11) | 0.21 | 341.97 (572.86) | 0.55 | 1870.59 (585.45) | 0.002* | 47.88 (93.65) | −66.83 to 361.66 | 0.03 (3%) |
| Impedimentsb | 20 | 0.16 (0.13) | 0.22 | −202.10 (726.23) | 0.78 | 1655.60 (788.60) | 0.04* | −32.32 (179.99) | −564.95 to 229.51 | −0.02 (−2%) |
| Social supporta | 8 | 0.07 (0.22) | 0.75 | 633.81 (274.49) | 0.02* | 1912.81 (561.93) | 0.001* | 45.53 (179.25) | −156.63 to 661.05 | 0.02 (2%) |
| Social supportb | 20 | −0.05 (0.23) | 0.82 | 578.01 (403.26) | 0.16 | 1684.70 (761.42) | 0.03* | −29.12 (157.80) | −492.06 to 235.47 | −0.02 (−2%) |
| Multi-mediation (all)e | 20 | - | - | - | - | 1499.81 (905.66) | 0.10 | 118.48 (460.17) | −740.53 to 1292.25 | 7.32 (7%) |
*denotes significant difference (P < 0.05)
aSample size n = 88; bSample size n = 74; cSample size n = 85; dSample size n = 71; eAdjusted for baseline steps and potential mediators at baseline