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Table 4 Intervention effect on mediators, effect of mediators on four screen behaviours and mediated effect

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

Mediator: parental regulation of TV-viewing reported by Effect on mediator a (95% CI) Effect of mediator on weekday TV viewing b (95% CI) Mediated effect ab (95% CI) Effect on mediator a (95% CI) Effect of mediator on weekend TV-viewing b (95% CI) Mediated effect ab (95% CI)
Adolescentsa -0.04 (-0.15; 0.07) -0.04 (-0.10; 0.01) 0.00 (0.00; 0.01) -0.03 (-0.14; 0.09) -0.01 (-0.13; 0.00) 0.00 (0.00; 0.06)
Mothersb 0.03 (-0.07; 0.12) -0.17 (-0.29; -0.06)** -0.01 (-0.02; 0.01) 0.02 (-0.08; 0.12) -0.16 (-0.30; -0.02)* -0.00 (-0.02; 0.01)
Fathersc -0.00 (-0.12; 0.11) -0.04 (-0.15; 0.07) -0.00 (-0.01; 0.01) -0.02 (-0.14: 0.09) -0.08 (-0.30; -0.02) 0.00 (-0.01; 0.03)
Mediator: parental regulation of comp/game-use reported by Effect on mediator a (95% CI) Effect of mediator on weekday comp/game-use b (95% CI) Mediated effect ab (95% CI) Effect on mediator a (95% CI) Effect of mediator on weekend comp/game-use b (95% CI) Mediated effect ab (95% CI)
Adolescentsa 0.03 (-0.09; 0.15) -0.01 (-0.06; 0.04) -0.00 (-0.01; 0.00) 0.03 (-0.10; 0.15) -0.02 (-0.07; 0.04) -0.00 (-0.01; 0.00)
Mothersb -0.04 (-0.15; 0.08) -0.17 (-0.27; -0.07)*** 0.07 (-0.01; 0.03) -0.03 (-0.10; 0.15) -0.05 (-0.16; 0.07) 0.00 (-0.00; 0.02)
Fathersc 0.05 (-0.08; 0.18) -0.14 (-0.24; -0.04)** -0.01 (-0.01; 0.03) 0.05(-0.10; 0.15) -0.06 (-0.16; 0.07) -0.00 (-0.03; 0.00)
  1. *p < .05, **p < .01, ***p < .001, otherwise non-significant.
  2. Comp/game-use: computer/game-use; SD: standard deviation.
  3. Analyses for TV-viewing were adjusted for weight status and parental education level.
  4. Analyses for computer/game-use were adjusted for gender, weight status and parental education level.
  5. an in analyses for adolescents: Weekday TV viewing = 1299; Weekend TV viewing = 1281; Weekday computer/game-use = 1286; Weekend computer/game-use = 1272.
  6. bn in analyses for mothers: Weekday TV viewing = 708; Weekend TV viewing = 698; Weekday computer/game-use = 693; Weekend computer/game-use = 687.
  7. cn in analyses for fathers: Weekday TV viewing = 601; Weekend TV viewing = 591; Weekday computer/game-use = 599; Weekend computer/game-use = 592.