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Table 3 Descriptive results (mean ± SD) and pairwise comparisons of the SampEn (with a non-unity time delay) 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

0.572 ± 0.096

0.599 ± 0.111

− 1.112

0.266

4.8

AP

1.296 ± 0.220

1.327 ± 0.202

− 1.633

0.102

2.4

V

1.281 ± 0.340

1.313 ± 0.344

− 1.739

0.101

2.5

LA-ShankAV

ML

0.439 ± 0.054

0.455 ± 0.063

− 1.464

0.163

3.5

AP

0.827 ± 0.204

0.840 ± 0.161

− 0.358

0.725

1.6

V

1.165 ± 0.140

1.180 ± 0.147

− 0.902

0.380

1.3

LA-ThighAV

ML

0.544 ± 0.091

0.570 ± 0.123

− 1.642

0.120

5.0

AP

1.210 ± 0.154

1.303 ± 0.158

− 3.898

0.001

7.7

V

1.317 ± 0.185

1.350 ± 0.193

− 1.963

0.067

2.5

MA-FootAV

ML

0.539 ± 0.073

0.560 ± 0.105

− 1.325

0.204

3.8

AP

1.174 ± 0.174

1.220 ± 0.186

− 1.561

0.138

4.0

V

1.142 ± 0.286

1.193 ± 0.302

− 1.857

0.082

4.4

MA-ShankAV

ML

0.442 ± 0.049

0.455 ± 0.056

− 1.541

0.143

3.1

AP

0.825 ± 0.172

0.881 ± 0.201

− 3.031

0.008

6.8

V

1.108 ± 0.173

1.127 ± 0.162

− 1.228

0.237

1.8

MA-ThighAV

ML

0.511 ± 0.073

0.544 ± 0.098

− 1.662

0.116

6.6

AP

1.178 ± 0.105

1.213 ± 0.102

− 1.108

0.284

2.9

V

1.283 ± 0.161

1.321 ± 0.134

− 1.563

0.138

2.9

COG-LA

ML

1.004 ± 0.139

1.061 ± 0.164

− 2.818

0.012

5.7

AP

1.090 ± 0.123

1.114 ± 0.120

− 2.015

0.061

2.2

V

1.049 ± 0.139

1.067 ± 0.138

− 0.969

0.347

1.7

SternumLA

ML

1.077 ± 0.143

1.122 ± 0.128

− 2.574

0.020

4.2

AP

1.405 ± 0.139

1.435 ± 0.157

− 1.121

0.279

2.1

V

0.992 ± 0.161

1.033 ± 0.182

− 2.767

0.014

4.1

  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