Table 2 Results from the lifestyle questionnaire in 1998 and 2008

Awake time

7:07

7:11

-0.632

NS

7:16

6:54

2.587

*

7:14

7:05

1.653

NS

Bedtime

21:12

21:01

0.943

NS

21:08

20:49

1.873

NS

21:09

20:36

1.194

NS

Time to play (min)

215

182

1.912

NS

227

186

3.187

**

201

155

2.790

**

Time to study (min)

-

-

-

-

-

-

-

-

-

-

-

-

Time to watch TV & play videogame

94

114

-1.203

NS

101

101

0.022

NS

79

87

-0.487

NS

G-4

G-5

G-6

1998

2008

t

p

1998

2008

t

p

1998

2008

t

p

Awake time

6:35

6:19

3.455

***

6:30

6:17

0.126

NS

6:44

6:22

-1.223

NS

Bedtime

20:56

21:01

0.102

NS

20:54

21:18

-3.491

***

21:10

21:12

1.453

NS

Time to play (min)

95

71

2.025

*

87

73

1.156

NS

100

91

-1.210

NS

Time to study (min)

80

46

-0.138

NS

115

57

2.519

*

114

71

-0.648

NS

Time to watch TV & play videogame

86

83

2.077

*

133

98

3.194

**

124

174

-0.871

NS

G-7

G-8

G-9

1998

2008

t

p

1998

2008

t

p

1998

2008

t

p

Awake time

6:32

6:20

0.987

NS

6:32

6:19

-1.408

NS

6:28

6:19

1.776

NS

Bedtime

21:10

21:32

0.958

NS

21:17

22:08

-2.626

**

21:32

21:56

-0.398

NS

Time to play (min)

75

75

-0.120

NS

85

63

0.690

NS

60

53

0.954

NS

Time to study (min)

158

89

0.544

NS

113

98

-1.498

NS

183

111

0.974

NS

Time to watch TV & play videogame

110

132

0.395

NS

125

114

1.283

NS

93

106

2.334

*

G-10

G-11

G-12

1998

2008

t

p

1998

2008

t

p

1998

2008

t

p

Awake time

5:45

5:56

-1.336

NS

5:54

5:57

-1.427

NS

5:50

6:17

-2.593

*

Bedtime

23:02

22:29

2.790

**

23:18

23:17

0.054

NS

23:39

23:57

-1.227

NS

Time to play (min)

27

45

-1.982

NS

67

111

-2.658

**

27

132

-2.922

**

Time to study (min)

127

119

0.592

NS

105

113

-0.554

NS

218

158

4.168

***

Time to watch TV & play videogame (min)

99

95

0.246

NS

117

166

-1.460

NS

61

97

-2.804

**