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Table 2 Mediation table for intervention effects

From: The Effect of a School-Based Intervention on Physical Activity and Well-Being: a Non-Randomised Controlled Trial with Children of Low Socio-Economic Status

Model: dependent variable Treatment on dependent variable
β coefficient (p value)
Hypothesised mediators Treatment on mediator
β coefficient (p value)
M1 on M2 and M3
β coefficient (p value) [95% CI]
M2 on M3
β coefficient (p value) [95% CI]
Treatment > M1 > dependent variable
Effect [95% CI]
Treatment > M2 > dependent variable
Effect [95% CI]
Treatment > M3 > dependent variable
Effect [95% CI]
Treatment > M1 > M2 > dependent variable
Effect [95% CI]
Treatment > M1 > M3 > dependent variable
Effect [95% CI]
Treatment > M2 > M3 > dependent variable
Effect [95% CI]
Treatment > M1 > M2 > M3 > dependent variable
Effect [95% CI]
Total sum of all the indirect effects
Effect [95% CI
1. Physical activity .45 (.00***) Autonomy-support (M1) .17 (.04*) n/a n/a .06 [.012 to .163]* .01 [− .015 to .087] .04 [.000 to .134] .01 [− .002 to .059] − .00 [− .036 to .011] .00 [− .004 to .037] .004 [.000 to .023]* .14 [.047 to .267]*
Needs satisfaction (M2) .15 (.08) .42 (.05)
[− .004 to .846]
n/a
Intrinsic motivation (M3) .02 (.80) − .01 (.70)
[− .118 to .084]
.04, (.12)
[− .012 to .105]
2. Well-being .07 (.42) Autonomy-support (M1) .17. (04*) n/a n/a .03 [.004 to .104]* .03 [− .015 to .099] − .00 [− .038 to .011] .01 [.003 to .054]* .00 [− .002 to .009] .00 [− .005 to .019] .00 [− .002 to .007] .09 [.010 to .194 ]*
Needs satisfaction (M2) .15 (.08) .43 (.00***) [.186 to .685] n/a
Intrinsic motivation (M3) .02 (80) .03 (.29) [− .035 to .113] .11 (.00***) [.066 to .165]
  1. Note: Control and intervention groups were coded as 0 and 1, respectively
  2. CI lower and upper confidence intervals, n/a non-applicable, italic type confidence intervals indicate a significance at p < .05 because the CIs do not include zero
  3. *p < .05, **p < .01, ***p < .001