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Normalisation of gait data in children

Stansfield, B.W. and Hazelwood, M.E. and Hillman, S.J. and Lawson, A.M. and Loudon, I.R. and Mann, A.M. and Robb, J.E. (2003) Normalisation of gait data in children. Gait and Posture, 17 (1). pp. 81-87. ISSN 0966-6362

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The comparative effect of semi-dimensional (SD) and non-dimensional (ND) normalisation on the results of a longitudinal study of gait in 5-12-year old children was investigated. The use of both height and leg length in the normalisation was examined. Only ND analysis could be used to identify subjects with the same accelerations. ND analysis of the children's gait indicated that there was little change in the combination of step length and cadence used to achieve a particular velocity between 5 and 12. The first peak and mid-stance trough values of the vertical component of ground reaction force did not change with age. We recommend the use of ND normalisation rather that SD to allow comparisons between individuals of differing size and mass.