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Some psychometric properties of the Chinese version of the Modified Dental Anxiety Scale with cross validation.

Yuan S, Freeman R, Lahti S, Lloyd-Williams F, Humphris G - Health Qual Life Outcomes (2008)

Bottom Line: Cross validation was tested with a North West of England comparison sample. 783 questionnaires were successfully completed from Beijing, 468 from England.Significant structural parameters between the two sub-scales (negative affectivity and autonomic anxiety) of the HADS anxiety items and the two newly identified factors of the MDAS were confirmed and duplicated in the comparison sample.The Chinese version of the MDAS has good psychometric properties and has the ability to assess, briefly, overall dental anxiety and two correlated but distinct aspects.

View Article: PubMed Central - HTML - PubMed

Affiliation: Dental Health Research Unit, Mackenzie Building, Ninewells Hospital, University of Dundee, UK. s.yuan@chs.dundee.ac.uk

ABSTRACT

Objective: To assess the factorial structure and construct validity for the Chinese version of the Modified Dental Anxiety Scale (MDAS).

Materials and methods: A cross-sectional survey was conducted in March 2006 from adults in the Beijing area. The questionnaire consisted of sections to assess for participants' demographic profile and dental attendance patterns, the Chinese MDAS and the anxiety items from the Hospital Anxiety and Depression Scale (HADS). The analysis was conducted in two stages using confirmatory factor analysis and structural equation modelling. Cross validation was tested with a North West of England comparison sample.

Results: 783 questionnaires were successfully completed from Beijing, 468 from England. The Chinese MDAS consisted of two factors: anticipatory dental anxiety (ADA) and treatment dental anxiety (TDA). Internal consistency coefficients (tau non-equivalent) were 0.74 and 0.86 respectively. Measurement properties were virtually identical for male and female respondents. Relationships of the Chinese MDAS with gender, age and dental attendance supported predictions. Significant structural parameters between the two sub-scales (negative affectivity and autonomic anxiety) of the HADS anxiety items and the two newly identified factors of the MDAS were confirmed and duplicated in the comparison sample.

Conclusion: The Chinese version of the MDAS has good psychometric properties and has the ability to assess, briefly, overall dental anxiety and two correlated but distinct aspects.

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Measurement model of the two factor version of the MDAS with standardized parameter estimates.
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Figure 1: Measurement model of the two factor version of the MDAS with standardized parameter estimates.

Mentions: On the strength of the positive evidence of overlap in item content of the first two MDAS questions the two factor model was specified in accordance with prediction (Figure 1). Items 1 and 2 comprised the anticipatory dental anxiety subscale (ADA). Items 3 to 5 described the proposed treatment procedure dental anxiety subscale (TDA). The two subscales were allowed to covary and all measurement error was assumed to be unsystematic, that is with no correlated errors specified. This model by definition gave an identical fit to Model B. This 2 factor model was invariant across gender, as tested by three increasingly stringent stages: (i) factor loadings; (ii) covariance between the two factors; and (iii) the error variances. These parameters for each element type (i–iii) were constrained in turn across gender to be equal and compared with the identical but unconstrained models. Results of these analyses (available on request from authors) showed equivalence at each step respectively (i) p > .7, (ii) p > .6, (iii) p = .07.


Some psychometric properties of the Chinese version of the Modified Dental Anxiety Scale with cross validation.

Yuan S, Freeman R, Lahti S, Lloyd-Williams F, Humphris G - Health Qual Life Outcomes (2008)

Measurement model of the two factor version of the MDAS with standardized parameter estimates.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2289811&req=5

Figure 1: Measurement model of the two factor version of the MDAS with standardized parameter estimates.
Mentions: On the strength of the positive evidence of overlap in item content of the first two MDAS questions the two factor model was specified in accordance with prediction (Figure 1). Items 1 and 2 comprised the anticipatory dental anxiety subscale (ADA). Items 3 to 5 described the proposed treatment procedure dental anxiety subscale (TDA). The two subscales were allowed to covary and all measurement error was assumed to be unsystematic, that is with no correlated errors specified. This model by definition gave an identical fit to Model B. This 2 factor model was invariant across gender, as tested by three increasingly stringent stages: (i) factor loadings; (ii) covariance between the two factors; and (iii) the error variances. These parameters for each element type (i–iii) were constrained in turn across gender to be equal and compared with the identical but unconstrained models. Results of these analyses (available on request from authors) showed equivalence at each step respectively (i) p > .7, (ii) p > .6, (iii) p = .07.

Bottom Line: Cross validation was tested with a North West of England comparison sample. 783 questionnaires were successfully completed from Beijing, 468 from England.Significant structural parameters between the two sub-scales (negative affectivity and autonomic anxiety) of the HADS anxiety items and the two newly identified factors of the MDAS were confirmed and duplicated in the comparison sample.The Chinese version of the MDAS has good psychometric properties and has the ability to assess, briefly, overall dental anxiety and two correlated but distinct aspects.

View Article: PubMed Central - HTML - PubMed

Affiliation: Dental Health Research Unit, Mackenzie Building, Ninewells Hospital, University of Dundee, UK. s.yuan@chs.dundee.ac.uk

ABSTRACT

Objective: To assess the factorial structure and construct validity for the Chinese version of the Modified Dental Anxiety Scale (MDAS).

Materials and methods: A cross-sectional survey was conducted in March 2006 from adults in the Beijing area. The questionnaire consisted of sections to assess for participants' demographic profile and dental attendance patterns, the Chinese MDAS and the anxiety items from the Hospital Anxiety and Depression Scale (HADS). The analysis was conducted in two stages using confirmatory factor analysis and structural equation modelling. Cross validation was tested with a North West of England comparison sample.

Results: 783 questionnaires were successfully completed from Beijing, 468 from England. The Chinese MDAS consisted of two factors: anticipatory dental anxiety (ADA) and treatment dental anxiety (TDA). Internal consistency coefficients (tau non-equivalent) were 0.74 and 0.86 respectively. Measurement properties were virtually identical for male and female respondents. Relationships of the Chinese MDAS with gender, age and dental attendance supported predictions. Significant structural parameters between the two sub-scales (negative affectivity and autonomic anxiety) of the HADS anxiety items and the two newly identified factors of the MDAS were confirmed and duplicated in the comparison sample.

Conclusion: The Chinese version of the MDAS has good psychometric properties and has the ability to assess, briefly, overall dental anxiety and two correlated but distinct aspects.

Show MeSH