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Table 3 Summary of group differences in static and dynamic balance scales and foot pressure distribution

From: The effect of self-reported knee instability on plantar pressure and postural sways in women with knee osteoarthritis

Variables

With instability (n = 26)

Without instability (n = 31)

p value

η2

M (SD)

M (SD)

Static

 Open eye

  APSI

0.78 (0.59)

0.46 (0.24)

0.01*

0.11

  MLSI

0.28 (0.30)

0.26 (0.23)

0.8

0.001

  OSI

0.92 (0.64)

0.75 (0.74)

0.37

0.01

 Close eye

  APSI

2.27 (1.29)

1.18 (0.56)

0.0001*

0.22

  MLSI

0.75 (0.61)

0.60 (0.55)

0.32

0.01

  OSI

2.39 (1.28)

1.84 (1.56)

0.14

0.03

Dynamic

 Open eye

  APSI

1.56 (1.21)

1.07 (0.51)

0.06

0.06

  MLSI

1.19 (0.97)

0.83 (0.60)

0.1

0.04

  OSI

2.66 (0.38)

1.45 (0.61)

0.14

0.03

 Close eye

  APSI

2.47 (1.14)

1.57 (0.51)

0.001*

0.18

  MLSI

2.30(0.86)

1.33 (0.67)

0.0001*

0.28

  OSI

4.15 (1.06)

2.48 (0.71)

0.0001*

0.46

Foot pressure distribution (dynamic)

 Gait line (mm)

  Right

218.53 (32.86)

225.90 (68.53)

0.6

0.001

  Left

253.31 (114.44)

212.23 (60.28)

0.11

0.04

 Contact time (s)

  Right

1.19 (0.45)

1.03 (0.26)

0.13

0.03

  Left

1.36 (0.66)

1.28 (0.63)

0.62

0.001

  1. All analyses were presented by mean (standard deviation)
  2. M: mean; SD: standard deviation; APSI: anterior–posterior stability index; MLSI: medial–lateral stability index; OSI: overall stability index; η2: effect size