Reliability and validity of the Child Perception Questionnaire 8 ~ 10 (CPQ 8~10 ) in China: an instrument for measuring oral health-related quality of life among 8–10-year-old children

Objectives Children aged 8–10 are in a critical stage of growth and development, facing complex and specific oral health problems. In China, there is no specific assessment questionnaire for this age group. The Child Perception Questionnare 8 ~ 10 (CPQ 8~10 ) has been widely used in many countries, with good reliability and validity. This study aimed to translate the CPQ 8~10 into Chinese and assess its reliability and validity, and ascertain its applicability for 8–10-year-old children in China. Materials and methods Brislin’s translation model was used in developing the Chinese version of CPQ 8~10 . Internal consistency, retest reliability, criterion validity, and confirmatory factor analysis were performed to evaluate the reliability and validity of the Chinese version of the CPQ 8~10 among 494 8 ~ 10-year-old children in China. Results A Chinese version of the CPQ 8~10 , aligned with Chinese culture and social features, was developed. The criterion validity was 0.719 ( P < 0.001). The item-level content validity index (I-CVI) and scale-level content validity index (S-CVI) for the Chinese version of the CPQ 8~10 were 0.80 ~ 1.00 and 0.968, respectively. Factor analysis revealed a logical relationship among the items in the Chinese version of the CPQ 8~10 . The Cronbach′s α coefficient, retest reliability, and Guttman split-half reliability coefficient for the Chinese version of the CPQ 8~10 were 0.819, 0.830, and 0.849, respectively. Conclusions The Chinese version of the CPQ 8~10 exhibited a structure consistent with the original questionnaire, displaying good reliability and validity. This study facilitates the application of CPQ 8~10 in China. Clinical relevance The Chinese version of the CPQ 8~10 is a brief and suitable tool to evaluate oral health-related quality of life of 8 ~ 10-year-old children.