Table 4 Interaction of screen time and exercise time on psychological symptoms among Chinese adolescents

Screen time (h/d)

Exercise time (min/d)

<1

<30

1.73 (1.45–2.07)

< 0.001

1.41 (1.18–1.68)

< 0.001

1.80 (1.45–2.24)

< 0.001

1.62 (1.33–1.97)

< 0.001

30–60

1.13 (0.93–1.38)

0.23

1.04 (0.86–1.27)

0.68

1.06 (0.83–1.36)

0.63

1.00 (0.80–1.25)

1.00

>60

1.43 (1.11–1.86)

0.01

1.37 (1.06–1.76)

0.02

1.25 (0.90–1.72)

0.18

1.40 (1.06–1.86)

0.02

1–2

<30

1.64 (1.34–2.02)

< 0.001

1.25 (1.02–1.54)

0.03

1.49 (1.16–1.92)

< 0.001

1.51 (1.21–1.89)

< 0.001

30–60

1

1

1

1

>60

1.14 (0.86–1.51)

0.37

1.04 (0.79–1.38)

0.79

1.20 (0.85–1.69)

0.30

1.07 (0.78–1.47)

0.66

>2

<30

2.41 (1.91–3.05)

< 0.001

2.00 (1.59–2.52)

< 0.001

2.45 (1.86–3.21)

< 0.001

2.30 (1.79–2.96)

< 0.001

30–60

1.25 (0.97–1.61)

0.09

1.37 (1.07–1.76)

0.01

1.39 (1.02–1.88)

0.04

1.25 (0.94–1.65)

0.12

>60

1.29 (0.92–1.82)

1.14

1.63 (1.18–2.24)

< 0.001

1.33 (0.88–1.99)

0.17

1.30 (0.90–1.87)

0.17