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

Adolescents^a

-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)

Mothers^b

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)

Fathers^c

-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)

Adolescents^a

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)

Mothers^b

-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)

Fathers^c

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)