Fractal analysis of gait in people with Parkinson's disease: three minutes is not enough.

ABSTRACT:

Background

The fractal dynamics of gait variability in people with Parkinson's disease has been studied by applying the detrended fluctuation analysis (DFA) to short time series (<200 strides). However, DFA is sensitive to time series length, and it is unclear if DFA results from short time series are reliable and if they reflect the fractal dynamics of longer time series.

Research question

Is DFA reliable when applied to short time series?

Methods

We applied DFA to stride time series from five 3-min trials and one 15-min trial in 12 people with Parkinson's disease, 14 healthy older adults and 14 healthy young adults walking overground. Within each group, intraclass correlations (ICC 3,1) were performed to assess the reliability of i) the five 3-min trials together, i

SUBMITTER: Marmelat V 

PROVIDER: S-EPMC6545579 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature