Validity and Reliability of a Questionnaire for Measuring Child Oral-health-related Quality of Life

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Abstract
Oral-health-related quality of life measures that exist are designed for adults. This study aimed to develop and evaluate the CPQ11-14, a self-report measure of the impact of oral and oro-facial conditions on 11- to 14-year-old children. An item pool was generated with the use of a literature review and interviews with health professionals, parents, and child patients. The 36 items rated the most frequent and bothersome by 83 children were selected for the CPQ11-14. Validity testing involved a new sample of 123 children. Test-retest reliability was assessed in a subgroup of these children (n = 65). Mean CPQ11-14 scores were highest for oro-facial (31.4), lower for orthodontic (24.3), and lowest for pedodontic (23.3) patients. There were significant associations between the CPQ11-14 score and global ratings of oral health (p < 0.05) and overall well-being (p < 0.01). The Cronbach's alpha and intraclass correlation coefficient for the CPQ11-14 were 0.91 and 0.90, respectively. These results suggest that the CPQ11-14 is valid and reliable.