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Table 6 Spearman’s ρ values between the trunk displacement parameters from the VIVE trackers and the results of balance performance tests

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

 

Solid surface

Soft surface

 

BBS

PASS

FIST

BBS

PASS

FIST

Eyes open

      

 RDISTAP

− 0.15

− 0.15

− 0.18

− 0.20

− 0.28

− 0.11

 RDISTML

− 0.28

− 0.35

0.24

− 0.20

− 0.19

− 0.24

 MVELOAP

− 0.68***

− 0.73***

− 0.27

− 0.56*

− 0.51*

− 0.58**

 MVELOML

− 0.75***

− 0.73***

− 0.41

− 0.38

− 0.29

− 0.50*

 AREA-CE

− 0.28

− 0.27

− 0.00

− 0.13

− 0.14

− 0.21

Eyes closed

      

 RDISTAP

− 0.12

− 0.16

0.03

0.10

− 0.08

0.12

 RDISTML

− 0.06

− 0.17

0.41

− 0.09

− 0.13

− 0.15

 MVELOAP

− 0.36

− 0.49*

0.09

− 0.34

− 0.44

− 0.17

 MVELOML

− 0.41

− 0.53*

− 0.03

− 0.17

− 0.21

− 0.17

 AREA-CE

− 0.13

− 0.16

0.25

0.09

− 0.04

0.12

  1. RDISTML Root mean square distance in the medial–lateral direction, RDISTAP Root mean square distance in the antero-posterior direction, MVELOML mean velocity in the medio-lateral direction, MVELOAP in the anterior–posterior direction, AREA-CE 95% confidence ellipse area
  2. *p < 0.05; **p < 0.01; ****p < 0.05