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Table 3 Action theory test, conceptual theory test and significance of the mediated effect on physical activity (step count) – Baseline to 3-months (April - June, 2011) and baseline to 6-months (April - December, 2011) Australia

From: Social support from teachers mediates physical activity behavior change in children participating in the Fit-4-Fun intervention

Hypothesized mediators Time Action theory test^   Conceptual theory test   Direct effect   Indirect effect 95% CI Proportion (%)
A (SE) p-value B (SE) p-value C’ (SE) p-value AB (SE)   AB/(C’ + AB)
Self Efficacy 1 0.04 (0.08) 0.62 1012 (635) 0.11 4368 (621) <0.001 41 (107) −107 to 357 1%
2 0.18 (0.11) 0.10 1081 (587) 0.68 3168 (725) <0.001 190 (168) −9 to 717 6%
Enjoyment 1 −0.16 (0.11) 0.14 860 (487) 0.08 4233 (625) <0.001 −140 (138) −697 to 19 3%
2 −0.23 (0.11) 0.05 1002 (527) 0.06 3775 (688) <0.001 −226 (168) −732 to 7 6%
Social Support (Friends) 1 0.01 (0.12) 0.91 407 (446) 0.36 4034 (605) <0.001 −90 (70) −89 to 247 2%
2 0.21 (0.14) 0.14 497 (426) 0.25 3423 (703) <0.001 106 (125) −34 to 573 3%
Social Support (Family) 1 0.03 (0.11) 0.82 612 (450) 0.18 3911 (605) <0.001 16 (86) −112 to 266 <1%
2 0.06 (0.12) 0.64 516 (515) 0.32 3402 (694) <0.001 29 (102) −100 to 411 <1%
Social Support (Teacher) 1 −0.12 (0.15) 0.43 −257 (337) 0.45 3937 (617) <0.001 32 (78) −49 to 357 <1%
2 0.54 (0.17) <0.001 828 (369) 0.03 3037 (714) <0.001 445 (242) 77 to 1068 13%
School Environment 1 0.28 (0.07) <0.001 −605 (733) 0.41 4037 (680) <0.001 −172 (187) −574 to 173 4%
2 0.58 (0.09) <0.001 742 (723) 0.31 2933 (836) <0.001 434 (459) −415 to 1507 13%
Multi-mediation (all) 2      3009 (894) <0.001 390 (570) −658 to 1714 11%
  1. 1= baseline to 3-month.
  2. 2= baseline to 6-month.
  3. Note. Control and intervention groups were coded ‘0’ and ‘1’ respectively; A = estimate of unstandardized regression coefficient of treatment condition predicting change in hypothesized mediators; B = estimate of unstandardized regression coefficient of change in hypothesized mediators predicting change in physical activity behavior, AB = product of coefficients estimate, C’ = effect of treatment condition on physical activity behavior controlling for mediator effect, SE = standard error, 95% CI = asymmetric bias-corrected bootstrap 95% confidence interval.
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