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Table 5 Intervention effect on mediators, effect of mediators on outcomes, mediated effect and moderated mediation of weight status

From: Post-intervention effects on screen behaviours and mediating effect of parental regulation: the HEalth In Adolescents study – a multi-component school-based randomized controlled trial

Mediators Normal weight Overweight  
Parental regulation of TV-viewing, reported by Intervention effect on mediator a (95% CI) Effect of mediator on weekday TV-viewingab (95% CI) Mediated effect ab (95% CI) Intervention effect on mediator a (95% CI) Effect of mediator on weekday TV-viewingab (95% CI) Mediated effect ab (95% CI) Moderated mediation ∆ab (95% CI)
Adolescents - 0.05 (-0.18; 0.08) -0.04 (-0.10; 0.02) -0.02 (-0.00; 0.01) 0.00 (-0.34; 0.35) -0.07 (-0.24; 0.10) -0.00 (-0.06; 0.04) 0.01 (-0.01; 0.03)
Mothers 0.01 (-0.09; 0.10) -0.13 (-0.26; -0.01)* -0.00 (-0.02; 0.01) 0.22 (-0.13; 0.57) -0.39 (-0.71; -0.06)* -0.09 (-0.33; 0.01) 0.09 (0.08; 0.10)**
Fathers -0.00 (-0.12; 0.12) -0.07 (-0.18; 0.04) -0.00 (-0.01; 0.02) 0.08 (-0.26; 0.42) 0.42 (-0.09; 0.93) 0.03 (-0.13; 0.29) -003 (-0.09; 0.03)
Parental regulation of comp/game-use, reported by Intervention effect on mediator a (95% CI) Effect of mediator on weekday comp/game-use b b (95% CI) Mediated effect ab (95% CI) Intervention effecton mediator a (95% CI) Effect of mediator weekday comp/game-use b b (95% CI) Mediated effect ab (95% CI) Moderated mediation ∆ab (95% CI)
Adolescents 0.05 (-0.08; 0.18) -0.01 (-0.06; 0.05) -0.00 (-0.01; 0.00) -0.11 (-0.47; 0.24) -0.04 (-0.19; 0.12) 0.01 (-0.01; 0.06) -0.01 (-0.03; 0.05)
Mothers -0.05 (-0.17; 0.07) -0.15 (-0.26; -0.04)** 0.01 (-0.01; 0.04) 0.05 (-0.36; 0.47) -0.28 (-0.55; -0.01)# -0.02 (-0.16; 0.09) 0.03 (-0.07; 0.01)
Fathers 0.06 (-0.07; 0.20) -0.16 (-0.26; -0.06)** -0.01 (-0.04; 0.01) -0.05 (-0.45; 0.36) 0.04 (-0.37; 0.45) -0.00 (-0.14; 0.11) -0.01 (-0.05; 0.03)
  1. #p < .10, *p < .05, **p < .01, otherwise non-significant.
  2. Comp/game-use: computer/game-use; SD: standard deviation.
  3. Stratified analyses on TV-viewing were adjusted for parental education level.
  4. Stratified analyses on computer/game-use were adjusted for gender and parental education level.
  5. an in analyses for Weekday TV-viewing: Adolescents: normal weight weight = 1130, overweight = 169; Mothers: normal weight = 620, overweight = 88; Fathers: normal weight = 538, overweight =63.
  6. bn in analyses for Weekday comp/game-use: Adolescents: normal weight = 1119, overweight = 167; Mothers: normal weight = 607, overweight = 86; Fathers: normal weight = 535, overweight = 64.