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Table 3 Differences in dependent variables before and 3 months after intervention in the two groups

From: Effectiveness of theory-based educational interventions of promoting oral health among elementary school students

Behavior

Variable

Group

Control

Intervention

P valuea

Re-range Scoresc

Mean (SD)

Mean (SD)

Control

Intervention

Difference

Knowledge

Before

2.56(1.39)

2.41(1.23)

0.41

36.5

34.7

1.8

After

3.05(1.50)

5/50(1.21)

<0.001

43.5

78.5

35

Difference

0.48

3.09

<0.001

7

43.8

 

P valueb

0.02

<0.001

    

Brushing with fluoride toothpaste

Behavior

Before

5.67(1.30)

5.26(0.90)

0.01

44.5

36.6

7.9

After

5.76(1.17)

7.16(1.12)

<0.001

46.0

69.3

22.1

Difference

0.10

1.90

<0.001

1.5

32.7

 

P valueb

0.83

<0.001

    

Self Efficacy

Before

4.59(1.07)

4.07(0.89)

<0.001

64.7

51.7

13

After

4.55(1.11)

5.30(1.83)

<0.001

63.7

82.5

18.8

Difference

−0/03

1.23

<0.001

1

30.8

 

P valueb

0.33

<0.001

    

Environment (school)

Before

5.14(2.04)

4.57(1.31)

0.02

14.2

7.2

7/0

After

4.32(0.83)

6.86(2.80)

<0.001

4

35.7

31.7

Difference

−0.82

2.29

<0.001

10.2

28.5

 

P valueb

<0.001

<0.001

    

Intention

Before

7.83(1.41)

7.20(1.11)

0.001

80.5

70

10.5

After

7.78(1.50)

8.48(0.90)

<0.001

79.6

91.3

11.7

Difference

−0.04

1.28

<0.001

0.9

21.3

 

P valueb

0.83

<  0.001

    

Physical Outcome

Before

6.82(1.66)

6.69(1.63)

0.59

63.6

61.5

2.1

After

7.06(1.87)

7.82(1.42)

0.002

79.5

81.3

1.8

Difference

0.24

1.12

0.002

15.9

19.8

 

P valueb

0.26

<  0.001

    

Self Efficacy In Overcoming Impediments

Before

5.94(2.05)

5.72(1.69)

0.42

49

45.3

3.6

After

6.03(1.99)

6.87(1.51)

0.001

50.5

64.5

14

Difference

0.08

1.14

<0.001

1.5

19.2

 

P valueb

0.70

<  0.001

    

Emotional Coping

Before

9.44(1.77)

9.00(1.54)

0.06

68

62.5

5.5

After

10.36(1.97)

10.51(1.56)

<0.001

79.5

81.3

1.8

Difference

−0.07

1.15

<0.001

11.5

18.8

 

P valueb

0.74

<  0.001

    

Outcome Expectations

Before

27.89(4.29)

26.77(3.93)

0.06

76.3

71.6

4.7

After

29.36(3.46)

30.01(2.99)

0.17

83.4

86.4

3

Difference

1.47

3.24

0.01

7.1

14.8

 

P valueb

0.003

<0.001

    

Environment (family)

Before

18.06(3.98)

17.52(3.30)

0.31

62.5

59.5

3

After

18.20(3.68)

19.53(3.35)

0.22

63.7

72

8.2

Difference

0.14

2.01

0.04

1.2

12.5

 

P valueb

0.06

<0.001

    

Situational Perception

Before

3.29(1.24)

3.18(1.07)

0.53

32.2

29.5

2.7

After

3.17(1.06)

3.58(1.31)

0.01

29.2

39.5

10.3

Difference

−0.11

0.40

0.01

3

10

 

P value┼

0.43

0.008

    

Perceived Barriers

Before

9.54(1.88)

9.16(1.63)

0.14

69.2

64.5

4.7

After

9.22(2.02)

9.94(1.63)

0.007

65.2

74.2

9

Difference

−0.32

0.77

0.001

4

9.7

 

P valueb

0.14

0.002

    

Outcome Expectancies

Before

26.88(3.88)

25.62(3.44)

0.01

84.4

78.1

6.3

After

26.52(3.75)

27.38(2.87)

0.07

82.6

86.9

4.3

Difference

−0.35

1.76

0.001

1.8

8.8

 

P valueb

0.47

<0.001

    

Flossing

Self Efficacy

Before

7.33(2.56)

6.10(2.02)

<0.001

41.6

26.5

15.1

After

7.40(2.66)

9.53(1.91)

<0.001

42.5

69.1

26.6

Difference

−0.76

3.43

<0.001

0.9

42.6

 

P valueb

0.09

<0.001

    

Behavior

Before

3.77(1.29)

3.18(0/62)

<0.001

 

44.2

29.5

After

3.50(1.03)

4.87(1.15)

<0.001

 

37.5

71.7

Difference

−0.27

1.68

<0.001

 

6.2

42.2

P valueb

0.03

<0.001

    

Flossing

Outcome Expectations

Before

21.36(5.59)

18.35(4.82)

<0.001

56.8

41.7

15.1

After

21.47(6.04)

25.54(4.27)

<0.001

57.3

77.5

20.2

Difference

0.11

7.18

<0.001

0.5

35.8

 

P valueb

0.86

<  0.001

    

Environment (family)

Before

9.71(3.33)

8.36(2.56)

0.002

47.1

33.6

13.5

After

9.01(3.09)

11.75(2.32)

<0.001

40.1

67.5

27.4

Difference

−0.70

3.38

<0.001

7

33.9

 

P valueb

0.06

<0.001

    

Intention

Before

2.76(0.49)

1.53(0.72)

<0.001

88.0

26.5

13.5

After

1.99(0.88)

2.16(0.81)

< 0.001

49.5

58.0

27.4

Difference

−0.24

1.23

< 0.001

38.5

31.5

 

P valueb

0.02

<0.001

    

Environment (school)

Before

4.89(1.67)

4.33(1.05)

0.007

11.1

4.12

6.9

After

4.27(1.05)

6.80(2.75)

<0.001

3.37

35.0

28.3

Difference

−0.62

2.46

<0.001

7.7

30.8

 

P valueb

0.001

<0.001

    

Emotional Coping

Before

8.80(1.97)

8.03(1.52)

0.003

60.0

50.3

9.7

After

8.78(1.91)

10.31(1.61)

<0.001

59.7

78.8

19.1

Difference

−0.02

2.48

<0.001

0.3

28.5

 

P valueb

0.96

<0.001

    

Situational Perception

Before

3.06(1.08)

2.66(0.94)

0.007

26.5

16.5

10

After

3.02(0.94)

3.54(1.22)

0.001

25.5

38.5

13

Difference

−0.04

0.88

<0.001

1

22

 

P valueb

0.73

<0.001

    

Perceived Barriers

Before

9.64(1.75)

9.17(1.76)

0.07

70.5

64.6

5.4

After

9.83(1.82)

10.35(1.50)

0.03

72.8

79.3

6.5

Difference

0.18

1.17

0.003

2.3

14.7

 

P valueb

0.45

<0.001

    

Outcome Expectancies

Before

26.88(3.88)

25.62(3.44)

0.01

84.4

78.1

6.3

After

26.52(3.75)

27.38(2.87)

0.07

82.6

86.9

4.3

Difference

−0.35

1.76

0.01

1.8

8.8

 

P valueb

0.47

<0.001

    
  1. a. Independent Samples T Test
  2. b. paired sample T test
  3. c. The scores between two groups, I.e., intervention and control groups, re-change to 0–100 for analysis