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Table 2 Item-total correlation and internal consistency of Health Belief Model Scale for oral health behaviors

From: Development and validation of the Oral health behavior questionnaire for adolescents based on the health belief model (OHBQAHBM)

Items of subscale

Mean

SD

Item-total correlation

Cronbach’s α If item deleted (n = 421)

Cronbach’s α of the subscale (n = 421)

Test-retest intra-class correlation (n = 40)

Subscale of perceived susceptibility

    

0.81

0.82

SUS1

There is a chance that I will get caries.

2.73

1.00

0.69

–

  

SUS2

There is a chance that I will have periodontal disease.

2.47

0.95

0.69

–

  

Subscale of perceived benefits

    

0.90

0.80

BEN3

I think brushing and flossing can make teeth healthier.

4.13

0.77

0.73

0.88

  

BEN5

I think brushing and flossing can prevent oral diseases from happening.

4.14

0.76

0.78

0.87

  

BEN6

I think brushing and flossing can make teeth look good.

4.09

0.73

0.77

0.88

  

BEN7

I think brushing and flossing can keep breath fresh.

4.02

0.81

0.72

0.88

  

BEN8

I think brushing and flossing can prevent inconvenient eating caused by oral diseases.

4.11

0.78

0.66

0.89

  

BEN9

I think brushing and flossing can help me avoid spending more time on dental treatment in the future.

3.81

0.84

0.66

0.89

  

BEN10

I think brushing and flossing can help me avoid spending more money on dental treatment in the future.

3.78

0.91

0.62

0.89

  

Subscale of perceived barriers

    

0.84

0.88

BAR11

I think it is difficult for me to brush twice a day.

1.83

0.92

0.47

0.83

  

BAR15

I think it’s a waste of time to brush and floss.

1.99

0.90

0.59

0.81

  

BAR16

I think I do not have enough time to have an annual dental visit.

2.55

1.09

0.54

0.82

  

BAR17

I am afraid of undergoing tooth treatment, so I don’t have dental visits annually.

1.93

0.89

0.68

0.79

  

BAR18

I think we have no money at my home, so I don’t have an annual dental visit.

1.94

0.97

0.68

0.79

  

BAR19

I think the dental clinic is far from my home, so I don’t have an annual dental visit.

2.06

1.01

0.71

0.78

  

Subscale pf cues to action

    

0.85

0.85

CUE20

Parents often reminds me of brushing and flossing

2.48

1.13

0.58

0.92

  

CUE21

Classmates often reminds me of brushing and flossing.

1.87

1.02

0.79

0.72

  

CUE22

Teachers often reminds me of brushing and flossing.

1.95

1.04

0.79

0.72

  

Subscale of perceived severity

    

0.89

0.88

SEV24

If I have caries, for me that is …

3.36

1.05

0.61

0.88

  

SEV25

If I have periodontal disease, for me that is …

3.86

1.02

0.71

0.87

  

SEV26

If my teeth do not look good because of oral diseases, for me that is …

3.60

1.02

0.72

0.87

  

SEV27

If I have bad breath because of oral diseases, for me that is …

3.80

0.98

0.79

0.86

  

SEV28

If I can’t sleep well because of oral diseases, for me that is …

1.06

1.02

0.69

0.87

  

SEV29

If I can’t eat my favorite food because of oral diseases, for me that is …

4.12

1.05

0.60

0.88

  

SEV30

If I get laughed at by classmates because of oral diseases, for me that is …

3.82

1.07

0.64

0.88

  

Subscale of self-efficacy

    

0.97

0.91

EFF

How confident you are that you will brush your teeth for 2 min twice daily on the circumstances below?

      

EFF33

When you are under a lot of stress

3.77

1.04

0.87

0.96

  

EFF34

During or after experiencing personal problems

3.74

1.08

0.88

0.96

  

EFF35

When you are feeling tired

3.44

1.15

0.80

0.97

  

EFF36

When you don’t feel like it

3.35

1.20

0.79

0.97

  

EFF37

When you are anxious

3.78

1.05

0.91

0.96

  

EFF38

After experiencing family problems

3.72

1.11

0.88

0.96

  

EFF39

When you have other commitments

3.71

1.08

0.87

0.96

  

EFF40

When you feel you don’t have

the time

3.49

1.18

0.84

0.97

  

EFF41

When you are feeling under pressure from school work

3.69

1.16

0.84

0.97

  

EFF42

When you have too much work to do at home

3.80

1.05

0.86

0.96

  
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BMC Public Health

ISSN: 1471-2458

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