Skip to main content

Table 5 Effect on mediators, effect of mediators on mcpm, mediated effect and moderated mediation of weight-status

From: Exploring mediators of accelerometer assessed physical activity in young adolescents in the HEalth In Adolescents study – a group randomized controlled trial

Mediators Weight status Intervention p Effect mediator on mcpm p Mediated effect p Moderated mediation p
   effect on mediator     ab (95% CI)    
   a (95% CI)   (b; 95% CI)     Δab (95% CI)  
Enjoyment Normal weight - 0.01 (-0.17; 0.16) .94 24.40 (-0.15; 48.94) .05 - 0.14 (-3.90; 3.61) .94 45.99 (27.44; 64.54) <.000
  Overweight - 0.47 (-0.90; -0.04) .03 97.65 (35.34; 159.95) .003 -46.13 (-95.73; 3.46) .07   
Self-efficacy Normal weight - 0.09 (-0.26; 0.08) .30 46.73 (21.25; 72.22) <.000 -4.05 (-11.91; 3.82) .31 - 0.30 (-15.97; 15.37) .97
  Overweight - 0.63 (-1.03; -0.23) .002 5.97 (-54.87; 66.80) .85 - 3.75 (-41.48; 33.98) .85   
Social support friends Normal weight -0.01 (-0.16; 0.14) .90 45.23 (23.47; 66.98) <.000 - 0.42 (-7.34; 6.50) .91 3.72 (-4.84; 12.27) .40
  Overweight - 0.15 (-0.67; 0.36) .54 26.68 (-24.53; 77.88) .30 - 4.13 (-19.47; 11.21) .60   
Social support parents Normal weight - 0.03 (-0.06; 0.10) .70 7.00 (-22.11; 36.10) .64 - 0.18 (-1.34; 0.97) .76 0.41 (-2.71; 3.53) .80
  Overweight - 0.03 (-0.36; 0.31) .88 23.61 (-51.40; 98.63) .53 - 0.59 (-8.57; 7.38) .88   
Social support teachers Normal weight 0.13 (0.03; 0.23) .01 - 9.21 (-43.69; 25.27) .60 - 1.20 (-5.78; 3.38) .61 - 6.48 (-13.88; 0.92) .09
  Overweight 0.12 (-0.19; 0.43) .43 43.32 (-4.41; 128.05) .31 5.28 (-11.20; 21.76) .53   
Environmental opportunities Normal weight 0.11 (-0.06; 0.29) .19 24.75 (1.62; 47.87) .04 2.84 (-2.07; 7.74) .26 5.40 (-1.03; 11.82) .10
  Overweight 0.10 (-0.35; 0.56) .65 -24.56 (-79.42; 30.30) .38 2.56 (-14.87; 9.75) .68   
  1. Mcpm = mean count per minute.
  2. Significant result in bold.