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Table 2 Descriptive results (mean ± SD) and pairwise comparisons of the SampEn (with a time delay of one) of single-task and dual-task trials

From: Regularity of kinematic data between single and dual-task treadmill walking in people with Parkinson’s disease

Signal

Direction

Single-task

Dual-task

t or Z

p-value

DTI (%)

LA-FootAV

ML

0.064 ± 0.007

0.065 ± 0.007

− 1.007

0.329

1.4

AP

0.332 ± 0.104

0.325 ± 0.103

− 0.544

0.586

− 2.0

V

0.119 ± 0.044

0.125 ± 0.043

− 1.586

0.113

4.8

LA-ShankAV

ML

0.117 ± 0.022

0.117 ± 0.018

− 0.002

0.999

0.0

AP

0.314 ± 0.087

0.311 ± 0.059

0.132

0.897

− 0.7

V

0.389 ± 0.076

0.384 ± 0.070

0.613

0.549

− 1.3

LA-ThighAV

ML

0.165 ± 0.035

0.168 ± 0.035

− 0.689

0.501

2.0

AP

0.424 ± 0.068

0.431 ± 0.069

− 0.667

0.514

1.8

V

0.486 ± 0.063

0.480 ± 0.062

0.776

0.449

− 1.3

MA-FootAV

ML

0.063 ± 0.007

0.064 ± 0.009

− 1.076

0.298

2.3

AP

0.271 ± 0.065

0.286 ± 0.068

− 1.475

0.160

5.5

V

0.099 ± 0.034

0.111 ± 0.040

− 2.580

0.010

11.6

MA-ShankAV

ML

0.115 ± 0.021

0.117 ± 0.022

− 0.687

0.502

2.1

AP

0.300 ± 0.055

0.307 ± 0.048

− 0.829

0.419

2.2

V

0.360 ± 0.075

0.362 ± 0.066

− 0.239

0.814

0.4

MA-ThighAV

ML

0.164 ± 0.036

0.169 ± 0.045

− 1.087

0.293

3.4

AP

0.409 ± 0.064

0.418 ± 0.050

− 0.834

0.417

2.3

V

0.459 ± 0.062

0.460 ± 0.054

− 0.828

0.407

0.3

COG-LA

ML

0.323 ± 0.055

0.345 ± 0.054

− 1.617

0.125

6.5

AP

0.450 ± 0.072

0.449 ± 0.059

0.114

0.911

− 0.2

V

0.329 ± 0.041

0.329 ± 0.037

0.080

0.938

− 0.1

SternumLA

ML

0.363 ± 0.042

0.359 ± 0.048

0.710

0.488

− 1.1

AP

0.474 ± 0.051

0.483 ± 0.058

− 1.065

0.287

2.0

V

0.324 ± 0.052

0.330 ± 0.049

− 1.328

0.203

2.0

  1. Values in bold indicate a significant (p < 0.05) difference. Dual-task interference (DTI) is calculated as DTI (%) = [(dual-task feature—single-task feature)/single-task feature] \(\times\) 100