This systematic review critically appraises the literature on the psychometric properties and clinical utility of evaluative activity limitation outcome measures used for children with cerebral palsy (CP). The search strategy yielded 29 articles for eight outcome measures that met the inclusion criteria for the review. The Gross Motor Function Measure and Activities Scale for Kids were found to have sound psychometric properties in most areas. Reliability was found to be adequate for all tools. For the CP population, further examination of some aspects of validity is required for the Child Health Questionnaire (CHQ), Functional Assessment Questionnaire (FAQ), Functional Mobility Scale (FMS), Pediatric Evaluation of Disability Inventory, Pediatric Outcomes Data Collection Instrument (PODCI), and the Functional Independence Measure for Children. The FAQ, CHQ, FMS, and PODCI were found to require further examination for responsiveness. Clinical utility of the measures varied. The FMS was the only one to differentiate between function in the home, school, and community and to consider different assistive devices. These findings suggest that a range of measures is required to evaluate activity, and assessment should be tailored to the individual needs of children with CP.

In population‐based studies, hip displacement affects approximately one‐third of children with cerebral palsy (CP). Given the extreme range of clinical phenotypes in the CP spectrum, it is unsurprising that hip development varies from normality, to dislocation and degenerative arthritis. Numerous radiological indices are available to measure hip displacement in children with CP; however, there is no grading system for assessing hip status in broad categorical terms. This makes it difficult to audit the incidence of hip displacement, determine the relationship between hip displacement and CP subtypes, assess the outcome of intervention studies, and to communicate hip status between health care professionals. We developed a categorical, radiographic classification of hip morphology based on qualitative indices and measurement of the key continuous variable, the migration percentage of Reimers. One hundred and thirty‐four radiographs were reviewed of 52 female and 82 male adolescents with CP who were at, or close to, skeletal maturity (mean age 16y 1mo [SD 1y 4mo] range 14y to 19y 1mo). Twenty‐nine were classified at Gross Motor Function Classification System level I, 25 at level II, 27 at level III, 24 at level IV, and 29 at level V. A classification system was developed to encapsulate the full spectrum of hip morphology in CP, with and without intervention.