Table 2 Summary of recreational screen time hours and proportion of screen overuse (≥ 4 h)

All ages (N = 63,211)

2.38

2.41

2.70

2.59

18,746 (22.72%)

18,212 (24.39%)

26,253 (32.80%)

25,612 (29.41%)

P value

–

0.0045

 < 0.0001

 < 0.0001

–

0.0002

 < 0.0001

 < 0.0001

Elementary school (age 6–10 years) (n = 21,857)

1.98

2.02

2.37

2.21

6478 (11.78%)

6249 (13.55%)

9130 (20.78%)

9983 (17.15%)

P value

–

0.0635

 < 0.0001

 < 0.0001

–

0.0026

 < 0.0001

 < 0.0001

Middle school (age 11–13 years) (n = 15,634)

2.46

2.47

2.79

2.67

4561 (24.36%)

4564 (24.30%)

6509 (34.59%)

5974 (30.48%)

P value

–

0.9190

 < 0.0001

 < 0.0001

–

0.9455

 < 0.0001

 < 0.0001

High school (age 14–17 years)

(n = 25,720)

2.80

2.86

3.03

3.01

7707 (34.88%)

7399 (38.00%)

10,614 (45.83%)

9655 (43.57%)

P value

–

0.0002

 < 0.0001

0.0540

–

 < 0.0001

 < 0.0001

0.0012