Development of the Japanese version of the Child Perceptions Questionnaire (CPQ8-10_JP)

The purpose of this study was to develop a Japanese version (_JP) of the Child Perceptions Questionnaire for 8-10-year-old children (CPQ8-10). CPQ8-10 was translated into Japanese by a forward-backward translation method. Its reliability was investigated among 228 elementary school children who were examined clinically for the status of dental caries, plaque accumulation, and malocclusion. Internal reliability was confirmed by a Cronbach's alpha coefficient of 0.85. Test-retest reliability was substantial (ICCs = 0.90; 95% CI, 0.88-0.92). Regarding validity assessment, significant correlations were observed between the CPQ8-10_JP score and the global rating of oral health (r = 0.37, p < 0.001), overall well-being (r = 0.46, p < 0.001) and presence of gingivitis (p < 0.05) but not dental caries and malocclusion. These findings suggest that CPQ8-10_JP is satisfactorily reliable and valid for application in 8-10-year-old Japanese elementary school children.