2004

2006

2009

2011

2015

Time trend

p value

Urban-boys (n = 1805)

6 - 10 yrs

In continuous (hrs/d)

1.48 (0.99)

1.51 (1.26)

1.69 (1.03)

1.72 (1.12)

1.63 (1.33)

0.696

>2 hrs/d (n, %)

10 (20.4)

12 (21.8)

24 (38.1)

31 (32.6)

28 (27.5)

0.171

11 - 18 yrs

In continuous (hrs/d)

1.32 (1.16)

1.94 (1.96)

2.01 (1.99)

2.14 (1.76)

2.09 (2.53)

<0.001

>2 hrs/d (n, %)

41 (21.1)

47 (32.9)

47 (42.0)

75 (39.9)

60 (35.3)

<0.001

19 - 24 yrs

In continuous (hrs/d)

1.95 (1.50)

4.18 (3.28)

4.53 (3.05)

5.13 (3.06)

3.26 (3.63)

<0.001

>2 hrs/d (n, %)

47 (37.3)

81 (69.2)

88 (79.3)

108 (79.3)

50 (53.8)

<0.001

Urban-girls (n = 1845)

6 - 10 yrs

In continuous (hrs/d)

1.35 (1.09)

1.34 (1.00)

1.73 (1.13)

1.61 (1.07)

1.63 (1.48)

0.215

>2 hrs/d (n, %)

17 (23.3)

11 (17.7)

18 (36.7)

31 (26.5)

34 (30.1)

0.189

11 - 18 yrs

In continuous (hrs/d)

1.11 (0.92)

1.37 (1.17)

2.05 (1.89)

1.96 (1.67)

1.55 (1.64)

<0.001

>2 hrs/d (n, %)

21 (12.1)

32 (23.7)

38 (33.0)

76 (37.8)

52 (31.5)

<0.001

19 - 24 yrs

In continuous (hrs/d)

1.67 (1.31)

2.99 (2.21)

3.37 (2.23)

3.91 (2.39)

3.00 (2.94)

<0.001

>2 hrs/d (n, %)

30 (25.2)

58 (61.1)

63 (64.9)

110 (75.3)

64 (53.3)

<0.001

Rural-boys (n = 4050)

6 - 10 yrs

In continuous (hrs/d)

1.43 (0.96)

1.72 (0.91)

1.83 (1.32)

1.81 (1.15)

1.73 (1.39)

0.006

>2 hrs/d (n, %)

45 (22.4)

71 (34.8)

56 (32.7)

71 (31.0)

83 (31.7)

0.072

11 - 18 yrs

In continuous (hrs/d)

1.39 (1.19)

1.82 (1.60)

1.91 (1.55)

2.07 (1.82)

1.67 (2.15)

<0.001

>2 hrs/d (n, %)

106 (22.3)

109 (33.2)

126 (36.4)

131 (41.5)

103 (28.5)

<0.001

19 - 24 yrs

In continuous (hrs/d)

1.78 (1.37)

2.71 (1.96)

3.43 (2.75)

3.87 (2.56)

2.53 (3.46)

<0.001

>2 hrs/d (n, %)

70 (31.7)

90 (51.4)

136 (61.3)

134 (72.0)

93 (39.2)

<0.001

Rural-girls (n = 3419)

6 - 10 yrs (n)

In continuous (hrs/d)

1.33 (0.91)

1.65 (1.09)

1.79 (1.04)

1.77 (1.07)

1.70 (1.33)

0.002

>2 hrs/d (n, %)

29 (18.4)

47 (32.0)

51 (38.1)

63 (34.2)

74 (33.6)

0.002

11 - 18 yrs

In continuous (hrs/d)

1.21 (1.02)

1.39 (1.00)

1.47 (1.17)

1.66 (1.23)

1.35 (1.57)

<0.001

>2 hrs/d (n, %)

58 (14.5)

64 (22.3)

70 (28.7)

87 (30.9)

73 (25.4)

<0.001

19 - 24 yrs

In continuous (hrs/d)

1.89 (1.31)

2.05 (1.52)

2.82 (2.14)

3.31 (1.99)

2.43 (3.48)

<0.001

>2 hrs/d (n, %)

65 (34.4)

61 (38,4)

114 (52.4)

128 (68.1)

83 (38.2)

<0.001