validation of persian version of pedsql™ 4.0tm generic core scales in toddlers and children

introduction: to evaluate the reliability, validity and feasibility of the persian version of the pediatric quality of life inventory (pedsql™ 4.0tm 4.0) generic core scales in iranian healthy students ages 7-15 and chronically ill children ages 2-18. methods: we followed the translation methodology proposed by developer to validate persian version of pedsql™ 4.0tm 4.0 generic core scales for children. six hundred and sixty children and adolescents and their parents were enrolled . sample of 160 healthy students were chosen by random cluster method between 4 regions of isfahan education offices and 60 chronically ill children were recruited from st. alzahra hospital private clinics. the questionnaires were fulfilled by the participants. results: the persian version of pedsql™ 4.0tm 4.0 generic core scales discriminated between healthy and chronically ill children (healthy students mean score was 12.3 better than chronically ill children, p <0.001). cronbachs’ alpha internal consistency values exceeded 0.7 for children self reports and proxy reports of children 5-7 years old and 13-18 years old. reliability of proxy reports for 2-4 years old was much lower than 0.7. although, proxy reports for chronically ill children 8-12 years old was more than 0.7, these reports for healthy children with same age group was slightly lower than 0.7. constructive, criterion face and content validity were acceptable. in addition, the persian version of pedsql™ 4.0tm 4.0 generic core scales was feasible and easy to complete. conclusion: results showed that persian version of pedsql™ 4.0tm 4.0 generic core scales is valid and acceptable for pediatric health researches. it is necessary to alternate scoring for 2-4 years old questionnaire and to find a way to increase reliability for healthy children aged 8-12 years especially, according to iranian culture.