title: Validation of Accelerometer Cut-Points in Children With Cerebral Palsy Aged 4 to 5 Years.
abstract: To derive and validate triaxial accelerometer cut-points in children with cerebral palsy (CP) and compare these with previously established cut-points in children with typical development.
  
  
  
  Eighty-four children with CP aged 4 to 5 years wore the ActiGraph during a play-based gross motor function measure assessment that was video-taped for direct observation. Receiver operating characteristic and Bland-Altman plots were used for analyses.
  
  
  
  The ActiGraph had good classification accuracy in Gross Motor Function Classification System (GMFCS) levels III and V and fair classification accuracy in GMFCS levels I, II, and IV. These results support the use of the previously established cut-points for sedentary time of 820 counts per minute in children with CP aged 4 to 5 years across all functional abilities.
  
  
  
  The cut-point provides an objective measure of sedentary and active time in children with CP. The cut-point is applicable to group data but not for individual children.
authors.affiliation: Queensland Cerebral Palsy and Rehabilitation Research Centre (Mss Keawutan, Oftedal, and Dr Boyd), UQ Child Health Research Centre, The University of Queensland, Brisbane, Australia; Department of Physical Therapy (Ms Keawutan), Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand; Dietetics and Food Services (Dr Bell), Lady Cilento Children's Hospital, Children's Health Queensland, South Brisbane, Australia; and Children's Nutrition Research Centre (Ms Oftedal and Dr Davies), The University of Queensland, Brisbane, Australia.
authors.forename: Piyapa
authors.initials: P
authors.lastname: Keawutan
authors.forename: Kristie L
authors.initials: KL
authors.lastname: Bell
authors.forename: Stina
authors.initials: S
authors.lastname: Oftedal
authors.forename: Peter S W
authors.initials: PS
authors.lastname: Davies
authors.forename: Roslyn N
authors.initials: RN
authors.lastname: Boyd
mesh_terms: D061725:Accelerometry / Q000379:methods* / Q000592:standards*; D002547:Cerebral Palsy / Q000503:physiopathology / Q000532:radiotherapy*; D002675:Child, Preschool; D004185:Disability Evaluation; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity; D026741:Physical Therapy Modalities; D015203:Reproducibility of Results; D057185:Sedentary Behavior