کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5707876 1603840 2017 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Undesirable properties of the dimensionless normalisation for spatio-temporal variables
ترجمه فارسی عنوان
خصوصیات نامطلوب عادی سازی بی معنا برای متغیرهای زمانی-زمانی
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
چکیده انگلیسی
We used theory and empirical data to demonstrate three undesirable properties of the dimensionless normalisation technique for gait spatio-temporal parameters. Firstly, it may not fully remove the correlation between leg length and spatio-temporal parameters. Secondly, it induces spurious correlation among spatio-temporal parameters, which might obscure their true correlation structure. Thirdly, it induces spurious correlation with external covariates, which complicates further statistical modelling. Therefore, depending on the objectives, we propose alternatives. If the objective is to compare datasets but remove the confounding effect of leg length, residualisation may be an alternative, although the generalisability of the residualisation is less well established than dimensionless normalisation. If the objective is to build a regression model, the raw spatio-temporal parameters could be used with leg length, or a function of leg length, as an explicit regressor to avoid spurious correlation. If correlation is the objective, partial correlation can be used instead.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gait & Posture - Volume 55, June 2017, Pages 157-161
نویسندگان
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