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dc.contributor.authorOftedal, S.
dc.contributor.authorBell, K.
dc.contributor.authorDavies, P.
dc.contributor.authorWare, R.
dc.contributor.authorBoyd, Roslyn
dc.identifier.citationOftedal, S. and Bell, K. and Davies, P. and Ware, R. and Boyd, R. 2014. Validation of accelerometer cut points in toddlers with and without cerebral palsy. Medicine and Science in Sports and Exercise. 46 (9): pp. 1808-1815.

AIM: The purpose of this study was to validate uni-and triaxial ActiGraph cut points for sedentary time in toddlers with cerebral palsy (CP) and typically developing children (TDC). METHODS: Children (n = 103, 61 boys, mean age = 2 yr, SD = 6 months, range = 1 yr 6 months-3 yr) were divided into calibration (n = 65) and validation (n = 38) samples with separate analyses for TDC (n = 28) and ambulant (Gross Motor Function Classification System I-III, n = 51) and nonambulant (Gross Motor Function Classification System IV-V, n = 25) children with CP. An ActiGraph was worn during a videotaped assessment. Behavior was coded as sedentary or nonsedentary. Receiver operating characteristic-area under the curve analysis determined the classification accuracy of accelerometer data. Predictive validity was determined using the Bland-Altman analysis. RESULTS: Classification accuracy for uniaxial data was fair for the ambulatory CP and TDC group but poor for the nonambulatory CP group. Triaxial data showed good classification accuracy for all groups. The uniaxial ambulatory CP and TDC cut points significantly overestimated sedentary time (bias =-10.5%, 95% limits of agreement [LoA] =-30.2% to 9.1%; bias =-17.3%, 95% LoA =-44.3% to 8.3%). The triaxial ambulatory and nonambulatory CP and TDC cut points provided accurate group-level measures of sedentary time (bias =-1.5%, 95% LoA =-20% to 16.8%; bias = 2.1%, 95% LoA =-17.3% to 21.5%; bias =-5.1%, 95% LoA =-27.5% to 16.1%). CONCLUSION: Triaxial accelerometers provide useful group-level measures of sedentary time in children with CP across the spectrum of functional abilities and TDC. Uniaxial cut points are not recommended. © 2014 by the American College of Sports Medicine.

dc.titleValidation of accelerometer cut points in toddlers with and without cerebral palsy
dc.typeJournal Article
dcterms.source.titleMedicine and Science in Sports and Exercise
curtin.departmentSchool of Occupational Therapy and Social Work
curtin.accessStatusOpen access via publisher

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