BACKGROUND: The Pediatric Outcomes Data Collection Instrument (PODCI) has been created to evaluate functional status, to assess therapeutic needs and changes after treatment in 2 to 18 years old children and adolescents who have orthopedic problems. The PODCI has three forms; parent form for children, parent and self report forms for adolescents. Instrument has 86 items assessing 'upper extremity and physical function', 'transfer and basic mobility', 'sports and physical function', 'pain/comfort', 'happiness', 'global functioning' and 'expectations from treatment domains'. The PODCI has been validated in multiple languages. The aim of this study was to investigate the reliability of the cross-cultural adapted Turkish version of the PODCI parent forms for children and adolescents in a variety of chronic musculoskeletal disorders.