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Table 4 The median (interquartile range) of all trunk displacement parameters and the results of comparison in the two groups

From: Application of a virtual reality tracker-based system to measure seated postural stability in stroke patients

Sway parameters

Groups

Solid、eyes open

Solid、eyes closed

Soft、eyes open

Soft、eyes closed

*p value

RDISTAP

(mm)

Stroke

1.69 (1.51)a

1.73 (1.17)b

2.32 (2.09)

3.18 (3.18)a,b

0.001

Control

0.94 (0.31)

0.86 (0.68)

1.16 (1.03)

1.17 (0.78)

0.036

&p value

0.001

0.001

0.001

 < 0.001

 

RDISTML (mm)

Stroke

0.62 (0.39)a

0.71 (0.49)b

2.12 (1.80)a,b

2.25 (0.96)a,b

 < 0.001

Control

0.41 (0.17)a

0.45 (0.33)b

1.21 (0.74)a,b

1.19 (0.67)a,b

 < 0.001

&p value

0.002

0.056

0.009

 < 0.001

 

MVELOAP

(mm/s)

Stroke

3.38 (0.66)

3.46 (0.92)

4.07 (1.24)

4.23 (1.80)

 < 0.001

Control

3.21 (0.48) a

3.38 (0.80)

3.71 (0.85) a

3.60 (0.73) a

0.072

&p value

0.218

0.782

0.151

0.029

 

MVELOML

(mm/s)

Stroke

1.99 (0.85)a

2.01 (0.79)b

3.09 (1.18)a

3.30 (1.35)a,b

 < 0.001

Control

1.88 (0.15)a

1.84 (0.47)

2.12 (0.57)

2.20 (0.48)a

0.013

&p value

0.345

0.195

 < 0.001

 < 0.001

 

AREA-CE

(mm2)

Stroke

14.45 (18.15)a

20.01 (17.65)b

81.78 (126.14)a,b

89.44 (124.95)a,b

 < 0.001

Control

4.35 (2.37)a

5.78 (7.49)b

24.64 (19.86)a,b

23.70 (20.12)a,b

 < 0.001

&p value

 < 0.001

 < 0.001

0.001

 < 0.001

 
  1. *p value: Comparison within the sitting tasks according to the Friedman test; &p value: Comparison between the groups according to Mann–Whitney U test
  2. a,bPaired comparison with significant difference according to Wilcoxon signed rank test and a Bonferroni correction