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Health and Quality of Life Outcomes
Published in: Health and Quality of Life Outcomes 1/2009

Open Access 01-12-2009 | Research

Psychometric properties of the Brazilian version of the Child Perceptions Questionnaire (CPQ11–14) – short forms

Published in: Health and Quality of Life Outcomes | Issue 1/2009

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Abstract

Background

The need to evaluate the impact of oral health has led to the development of instruments for measuring oral health-related quality of life (OHQoL). One such instrument is the Child Perceptions Questionnaire (CPQ11–14), developed specifically for 11-to-14-year-old children. As this questionnaire was considered long (37 items), shorter forms were developed with 8 (Impact Short Form: 8 – ISF:8) and 16 items (Impact Short Form: 16 – ISF:16) to facilitate use in the clinical setting and population-based health surveys. The aim of the present study was to translate and cross-culturally adapt these CPQ11–14 short forms for Brazilian Portuguese and evaluate the measurement properties of these versions for use on Brazilian children.

Methods

Following translation and cross-cultural adaptation, the ISF:8 and ISF:16 were tested on 136 children from 11 to 14 years of age in the city of Belo Horizonte, Brazil. The instrument was administered by a trained researcher who also performed clinical examinations. The measurement properties (i.e. criterion validity, construct validity, internal consistency reliability, test-retest reliability) were determined. Discriminant validity was tested between groups, which were divided into children with no cavities and no malocclusion; children with cavities and without malocclusion; and children with malocclusion and without cavities.

Results

The mean total score was 6.8 [standard deviation (SD) 4.2] for the ISF:8 and 11.9 (SD 7.6) for the ISF:16 (p < 0.001). Statistically significant associations were found between oral abnormalities and the subscales of the ISF:8 and ISF:16 (p < 0.05). Both test-retest stability and internal consistency, as measured by the intra-class correlation coefficient (ICC) (ISF:8 = 0.98 and ISF:16 = 0.97) and Cronbach's alpha (ISF:8 = 0.70 and ISF:16 = 0.84) proved to be adequate. Construct validity was confirmed from the correlation between the short form scores and oral health and overall well-being ratings. The score on the short forms of the CPQ11–14 was able to discriminate between different oral conditions. Criterion validity was satisfactory (p < 0.05).

Conclusion

The Brazilian versions of CPQ11–14 ISF:8 and ISF:16 have satisfactory psychometric properties, similar to those of the original instrument.
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Metadata
Title
Psychometric properties of the Brazilian version of the Child Perceptions Questionnaire (CPQ11–14) – short forms
Publication date
01-12-2009
Published in
Health and Quality of Life Outcomes / Issue 1/2009
Electronic ISSN: 1477-7525
DOI
https://doi.org/10.1186/1477-7525-7-43

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