Responsiveness and uniqueness of the pediatric outcomes data collection instrument compared to the gross motor function measure for measuring orthopaedic and neurosurgical outcomes in cerebral palsy.

The Pediatrics Outcomes Data Collection Instrument (PODCI) is a valid and reliable measure of functional health status in children with acute and chronic musculoskeletal disorders, including cerebral palsy (CP), but its responsiveness has not been documented specifically for this population. The Gross Motor Function Measure (GMFM) and the Pediatric Evaluation of Disability Inventory (PEDI) are the only two instruments validated specifically as evaluative measures for CP, and while widely used, they are limited by a ceiling effect when assessing higher-functioning children. The PEDI is further restricted to children who are 7 years old or less.