Using questionnaire design to explore reporting differences for spasticity related pain in children and adolescents with cerebral palsy

• Children/adolescents with CP were eligible to participate in the study if they were between 5 and 17 years old, had upper or lower limb SRP, had any level of functional ability as determined by a Gross Motor Function Classification System (GMFCS) score, and were able to communicate sufficiently to respond to interview questions. In the case of children 2-4 years old, only their parent/caregiver was scheduled for an interview.