Variability explained by strength, body composition and gait impairment in activity and participation measures for children with cerebral palsy: a multicentre study.

Objective: To determine the amount of variability in scores on activity and participation measures used to assess ambulatory individuals with cerebral palsy explained by strength, body composition, gait impairment and participant characteristics.

Design: Multicentre prospective cross-sectional study.

Setting: Seven paediatric-orthopaedic specialty hospitals.