Validity and Reliability of Farsi Version of Cerebral Palsy-Quality of Life Questionnaire

The purpose of this study was to translate "Cerebral Palsy Quality of Life" (CPQOL) questionnaire into Farsi and to determine its validity and reliability. In this cross-sectional study, CPQOL was first translated into Farsi through 5 stages, and then its validity and reliability. 200 parents of children with cerebral palsy aged 4-12 years were recruited from 8 selected rehabilitation center and 3 special education schools. Reliability (internal consistency and test-retest within a 3-week interval) and construct validity with Gross Motor Function Classification System (GMFCS) and Manual Ability Classification System (MACS). Spearman's correlation coefficient was used to asses the relationship between CPQOL and GMFCS- E & R (0.18-0.32) and between CPQOL and MACS (0.13-0.40). Item discriminant validity was shown by %75 of items. Cranach’s alpha (0.61-0.87), SEM (4/8-15.27), interaclass correlation (0.47-0.84) showed high reliability of Farsi CPQOL questionnaire. Farsi version of CPQOL has acceptable validity and reliability rates. It is now useful enough to be used for clinical as well as research purposes.