Table 4 Unadjusted models for intervention effect on screen-time per intervention stage and the whole intervention period

β [95 % CI]

P^b

β [95 % CI]

P^b

ICC ^c

β [95 % CI]

P^b

ICC ^c

β [95 % CI]

P^b

ICC ^c

TV on a weekday (min/day)

−14.81 [−25.09, −4.52]

0.005

11.96 [1.08, 22.84]

0.03

0.08

−3.00 [−13.72, 16.35]

0.58

0.07

−7.84 [−17.95, 2.27]

0.13

0.08

TV on a weekend (min/day)

−18.32 [−31.45, −5.18]

0.006

9.93 [−6.2, 26.06]

0.23

0.00

−10.22 [−23.24, 3.44]

0.12

0.00

−15.15 [−27.33, −2.97]

0.02

0.00

Video games on a weekday (min/day)

−1.89 [−7.07, 3.28]

0.47

5.96 [−0.77, 12.68]

0.08

0.03

5.068 [−1.68, 3.95]

0.14

0.03

2.80 [−3.22, 8.79]

0.36

0.03

Video games on a weekend day (min/day)

−6.08 [−14.89, 2.72]

0.18

1.51 [−7.79, 10.81]

0.75

0.04

−5.18 [−14.28, 7.42]

0.27

0.04

−6.50 [−15.01, 2.04]

0.13

0.05

Computer on a weekday (min/day)

2.52 [−7.85, 12.89]

0.63

2.16 [−8.89, 13.21]

0.70

0.09

3.00 [−9.24, 17.67]

0.63

0.07

4.48 [−7.78, 16.74]

0.48

0.08

Computer on a weekend day (min/day)

−4.19 [−17.03, 8.64]

0.52

0.73 [−12.14, 13.6]

0.91

0.09

−6.50 [−20.72, 10.30]

0.37

0.08

−5.38 [−19.43, 8.65]

0.45

0.08

Total screen-time on a weekday (min/day)

−13.45 [−29.81, 2.92]

0.11

19.3 [0.4, 38.21]

0.05

0.04

5.15 [−14.56, 17.02]

0.61

0.03

−0.64 [−18.68, 17.39]

0.94

0.03

Total screen-time on a weekend day (min/day)

−30.42 [−53.17, −7.69]

0.01

11.97 [−11.54, 35.47]

0.32

0.02

−23.24 [−47.60, 1.74]

0.06

0.02

−28.42 [−50.74, −6.10]

0.01

0.02

Proportion of adolescents who exceed 180 min/day on screen-time behaviours

−0.05 [−0.18, 1.10]

0.06

0.00 [−0.1, 0.0]

0.90

0.01

−0.06 [0.0, 0.0]

0.02

0.02

−0.06 [0.0, 0.0]

0.004

0.01