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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.