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Table 2 Time trends of health risk behaviors in subjects by grade (n = 1,820)

From: Changes in health risk behaviors of elementary school students in northern Taiwan from 2001 to 2003: results from the child and adolescent behaviors in long-term evolution study

Behaviors

Total

Boys

Girls

 

Grade 4 (2001)

Grade 5 (2002)

Grade 6 (2003)

Linear trend analysis

Grade 4 (2001)

Grade 5 (2002)

Grade 6 (2003)

Linear trend analysis

Grade 4 (2001)

Grade 5 (2002)

Grade 6 (2003)

Linear trend analysis

 

Mean

SD

Mean

SD

Mean

SD

T value

Sig.

Mean

SD

Mean

SD

Mean

SD

T value

Sig.

Mean

SD

Mean

SD

Mean

SD

T value

Sig.

1. Swearing

1.75

0.77

1.79

0.78

2.00

0.84

11.87

***

1.86

0.81

1.91

0.83

2.11

0.83

8.56

***

1.65

0.71

1.66

0.71

1.89

0.83

8.24

***

2. Staying up late

2.34

0.93

2.34

0.95

2.56

0.93

8.56

***

2.38

0.95

2.38

0.99

2.57

0.93

5.18

***

2.30

0.92

2.29

0.90

2.55

0.92

7.03

***

3. Playing video games for prolonged periods

1.63

0.87

1.53

0.87

1.75

0.99

4.61

***

1.86

0.97

1.80

1.00

1.99

1.08

3.30

**

1.39

0.66

1.25

0.57

1.48

0.80

3.29

**

4. Vandalism

1.08

0.31

1.09

0.33

1.10

0.34

1.67

-

1.12

0.38

1.12

0.40

1.13

0.39

0.34

-

1.04

0.19

1.05

0.24

1.06

0.28

2.68

**

5. Watching TV for prolonged periods

2.11

0.98

1.99

0.99

2.15

1.00

1.35

-

2.18

1.02

2.05

1.04

2.17

1.02

-0.28

-

2.04

0.94

1.92

0.93

2.12

0.97

2.36

*

6. Eating snacks at night

2.02

0.92

1.97

0.90

2.05

0.89

1.10

-

2.01

0.94

2.03

0.94

2.09

0.92

2.14

*

2.03

0.89

1.92

0.85

2.00

0.85

-0.71

-

7. Throwing things when angry

1.34

0.62

1.27

0.58

1.34

0.62

-0.01

-

1.40

0.68

1.33

0.64

1.39

0.67

-0.57

-

1.28

0.55

1.22

0.50

1.29

0.57

0.73

-

8. Smoking

1.02

0.15

1.01

0.13

1.01

0.11

-1.77

-

1.03

0.20

1.02

0.17

1.01

0.12

-2.28

*

1.00

0.08

1.00

0.07

1.01

0.09

0.61

-

9. Eating fast food

1.74

0.65

1.72

0.62

1.70

0.63

-2.42

*

1.77

0.67

1.74

0.64

1.73

0.65

-1.61

-

1.71

0.63

1.69

0.59

1.66

0.59

-1.85

-

10. Hitting others

1.67

0.71

1.46

0.67

1.62

0.73

-2.47

*

1.72

0.74

1.46

0.67

1.58

0.72

-4.76

***

1.61

0.68

1.47

0.68

1.66

0.75

1.45

-

11. Chewing betel nut

1.02

0.17

1.00

0.09

1.00

0.06

-3.57

***

1.03

0.22

1.01

0.12

1.00

0.08

-3.14

**

1.00

0.08

1.00

0.03

1.00

0.00

-1.85

-

12. Drinking alcohol

1.10

0.36

1.07

0.28

1.07

0.31

-3.62

***

1.13

0.41

1.09

0.33

1.07

0.34

-3.95

***

1.07

0.28

1.04

0.20

1.06

0.28

-0.78

-

13. Suppressing urination

1.66

0.71

1.53

0.64

1.55

0.64

-5.94

***

1.65

0.74

1.50

0.62

1.52

0.63

-4.77

***

1.67

0.69

1.55

0.65

1.58

0.65

-3.57

***

  1. *: p < 0.05, **: p < 0.01, ***: P < 0.001.
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BMC Public Health

ISSN: 1471-2458

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