Validity and reliability of the Persian version of parent report of the Quality of Life Questionnaire for adolescence with Cerebral Palsy

Children with cerebral palsy have impaired quality of life for reasons such as sensory-motor impairments. There is no tool in Persian to examine quality of life of children with cerebral palsy based on their specific conditions. Therefore, the purpose of this study was to assess psychometric properties of the Persian version of the parent report of the Quality of Life Questionnaire for adolescence with Cerebral Palsy (CP QOL Teen).
In this psychometrics measurement study, CP QOL (parent report) was translated to Persian based on the International Quality of Life Assessment Project (International Quality Of Life Assessment Project: IQOLA), and then its face validity, content validity, construct validity, and reliability were assessed. A convenient sample of subjects including 82 parents of adolescence with cerebral palsy (13-18 years old), were recruited.
Face and content validity were obtained by parents and experts respectively. Content Validity Index was 0.62. There was a significant correlation between total score and subscales scores of the questionnaire and also, between total score and GMFCS. The intraclass correlation coefficient for the total score was 0.994. Also, cronbach's coefficient α for the internal consistency of all of the questions of the questionnaire were 0.996.
Persian version of the parent report of CPQOL has acceptable reliability and validity. It is a useful assessment tool for evaluating the quality of life of adolescence with cerebral palsy.