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Table 4 Common foot variables in participants with KOA (data reported as mean ± standard deviation)

From: Foot characteristics and mechanics in individuals with knee osteoarthritis: systematic review and meta-analysis

Foot variables

Study, year

Instrument- Shod condition

Results

P-value

KOA

Controls

Foot Progression Angle or toe-out degree (0)

Bechard et al., 2012

3D motion analysis system, force platform- Wearing lab shoes

6.2 ± 6.1

9.4 ± 5.0

0.68

Booij et al., 2020

3D motion analysis system, force platform- Barefoot

−40.12 ± 4.80

No controls

NA

Chang et al., 2007

3D motion analysis system, force platform- Barefoot

18.1 ± 8.4

No controls

NA

Guo et al., 2007

3D motion analysis system, force platform- Wearing lab shoes

2.0 ± 6.8

No controls

NA

Hinman et al., 2012

3D motion analysis system, force platform- Wearing lab shoes

−6.06 ± 5.56

No controls

NA

Khan et al., 2019

3D motion analysis system, force platform- Barefoot

9.6 ± 3.7

No controls

NA

Krackow et al., 2011

3D motion analysis system, force platform- Barefoot

8.58 ± 2.37

15.36 ± 2.12

NR

Paquette et al., 2015

3D motion analysis system, force platform- Barefoot

13 ± 4

12.2 ± 3.5

0.82

Rutherford et al., 2008

3D motion analysis system, force platform- Barefoot

7.5 ± 5

7.3 ± 5

NA

Rutherford et al., 2010

3D motion analysis system, force platform- Barefoot

6.6 ± 7.3

4.9 ± 4.7

0.625

Simic et al., 2013

3D motion analysis system- Wearing lab shoes

−4.5 ± 1.5

No controls

NA

Trombini-Souza et al., 2011

3D motion analysis system, force platform- Barefoot

12.2 ± 6.74

13.1 ± 7.90

0.71

Peak rearfoot eversion (0)

Arnold et al., 2014

3D motion analysis system, force platform – Barefoot

5.3 ± 4.2

4.5 ± 5.0

0.850

Butler et al., 2009

3D motion analysis system, force platform- Wearing lab shoes

3.5 ± 4.3

No controls

NA

Butler et al., 2011

3D motion analysis system, force platform- Wearing lab shoes

6.2 ± 5.0

3.5 ± 2.7

0.01*

Chapman et al., 2015

3D motion analysis system, force platform- Wearing lab shoes

3.51 ± 2.77

No controls

NA

Erhart-Hledik et al., 2017

3D motion analysis system, force platform- Wearing lab shoes

13.9 ± 5.4

No controls

NA

Levinger et al., 2012

3D motion analysis system, force platform- Barefoot

1.3 ± 5.2

2.3 ± 3.9

NR

Nigg et al., 2006

Biodex system- Wearing lab shoes

41.9

No controls

NA

Peak rearfoot inversion (0)

Arnold et al., 2014

3D motion analysis system, force platform- Barefoot

1.4 ± 4.4

1.1 ± 4.2

0.708

Levinger et al., 2012

3D motion analysis system, force platform- Barefoot

11.6 ± 5.2

14.9 ± 5.0

NR

Nigg et al., 2006

Biodex system- Wearing lab shoes

45.1

No controls

NA

Pes planus prevalence (%)

Abourazzak et al., 2014

Visual observation (FPI)- Barefoot

42

22

0.03*

Guler et al., 2009

Objective manual testing- Barefoot

38.3

No controls

NA

Foot pronation (difference in FPI)

Abourazzak et al., 2014

Visual observation (FPI)- Barefoot

1.5 ± 2.68

0.72 ± 2.63

0.05*

Levinger et al., 2010

Visual observation (FPI)- Barefoot

2.46 ± 2.18

1.35 ± 1.43

0.022*

  1. *Statistically significant p-value at 95% confidence interval
  2. Abbreviations: 3D three dimensional, FPI foot posture index, KOA knee osteoarthritis, NA not applicable, NR not reported