In continuous (hrs/d)

1.25 (0.97)

1.37 (1.08)

1.62 (1.32)

1.84 (1.47)

1.51 (1.74)

<0.001

>2 hrs/d (n, %)

41 (14.6)

43 (20.9)

51 (27.7)

75 (36.8)

75 (28.2)

<0.001

19 - 24 yrs

In continuous (hrs/d)

1.91 (1.31)

2.22 (1.81)

2.93 (2.14)

3.48 (2.25)

2.32 (3.27)

<0.001

>2 hrs/d (n, %)

53 (32.5)

58 (43.6)

92 (53.5)

102 (68.9)

76 (38.6)

<0.001

High Urbanization-boys (n = 4050)

6 - 10 yrs

In continuous (hrs/d)

1.35 (0.68)

1.38 (0.94)

1.56 (0.91)

1.66 (1.13)

1.61 (1.31)

0.620

>2 hrs/d (n, %)

3 (12.0)

5 (15.6)

17 (33.3)

24 (26.1)

25 (25.5)

0.220

11 - 18 yrs

In continuous (hrs/d)

1.20 (1.05)

1.90 (1.93)

1.67 (1.49)

2.07 (1.67)

1.80 (2.12)

0.001

>2 hrs/d (n, %)

21 (18.6)

38 (34.9)

30 (28.0)

79 (40.1)

48 (30.4)

0.002

19 - 24 yrs

In continuous (hrs/d)

1.66 (1.47)

4.17 (3.43)

5.10 (3.25)

5.07 (2.94)

3.12 (3.86)

<0.001

>2 hrs/d (n, %)

15 (32.6)

51 (63.7)

66 (81.5)

96 (87.3)

47 (50.0)

<0.001

High Urbanization-girls (n = 3419)

6 - 10 yrs

In continuous (hrs/d)

1.34 (1.17)

1.33 (1.01)

1.63 (1.08)

1.54 (1.05)

1.53 (1.38)

0.746

>2 hrs/d (n, %)

8 (21.6)

6 (20.0)

13 (37.1)

28 (26.2)

26 (23.0)

0.452

11 - 18 yrs

In continuous (hrs/d)

0.89 (0.79)

1.30 (1.09)

1.82 (1.86)

1.89 (1.56)

1.38 (1.41)

<0.001

>2 hrs/d (n, %)

6 (7.3)

21 (23.9)

27 (30.3)

72 (36.0)

37 (28.7)

<0.001

19 - 24 yrs

In continuous (hrs/d)

1.57 (1.20)

3.10 (2.31)

3.49 (2.28)

4.17 (2.17)

3.44 (3.50)

<0.001

>2 hrs/d (n, %)

11 (25.6)

33 (62.3)

40 (66.7)

101 (81.5)

60 (56.1)

<0.001