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Table 3 Comparison of the static and dynamic postural stability and the knee muscle strength between involved and uninvolved side knees in each group

From: Poorer dynamic postural stability in patients with anterior cruciate ligament rupture combined with lateral meniscus tear than in those with medial meniscus tear

 

ACL rupture combined with MM tear

ACL rupture combined with LM tear

Involved knee

Uninvolved knee

p value

Involved knee

Uninvolved knee

p value

Static OSI

1.7 ± 1.0

1.6 ± 0.7

0.237

1.8 ± 0.9

1.6 ± 0.4

0.102

 MD (95% CI)

−0.1 (− 0.3, 0.1)

 

− 0.2 (− 0.5, 0)

 

Static APSI

1.3 ± 0.9

1.2 ± 0.6

0.226

1.4 ± 0.8

1.3 ± 0.6

0.250

 MD (95% CI)

− 0.1 (− 0.3, 0.1)

−0.1 (− 0.4, 0.1)

 

Static MLSI

1.2 ± 0.9

1.1 ± 0.7

0.385

1.2 ± 0.8

1.0 ± 0.5

0.217

 MD (95% CI)

− 0.1 (− 0.3, 0.1)

 

− 0.2 (− 0.4, 0.1)

 

Dynamic OSI

1.6 ± 0.5

1.7 ± 0.6

0.237

2.0 ± 0.8

1.8 ± 0.6

0.100

 MD (95% CI)

0.1 (− 0.1, 0.3)

 

− 0.2 (− 0.6, 0.1)

 

Dynamic APSI

1.3 ± 0.5

1.3 ± 0.5

0.827

1.5 ± 0.6

1.3 ± 0.6

0.166

 MD (95% CI)

0 (− 0.2, 0.2)

 

−0.2 (− 0.5, 0.1)

 

Dynamic MLSI

0.9 ± 0.4

1.0 ± 0.5

0.408

1.0 ± 0.5

0.9 ± 0.4

0.205

 MD (95% CI)

0.1 (−0.1, 0.3)

 

−0.1 (− 0.4, 0.1)

 

Quadriceps strength

109 ± 44.1

200 ± 40.1

< 0.001a

111 ± 42.4

202 ± 38.9

< 0.001a

 MD (95% CI)

91 (78.3, 105.1)

 

91 (79.3, 103.9)

 

Hamstring strength

49 ± 27.2

100 ± 21.9

< 0.001a

61 ± 31.6

110 ± 27.2

< 0.001a

 MD (95% CI)

51 (42.9, 58.8)

 

49 (37.9, 61.2)

 
  1. Values expressed as mean ± standard deviation
  2. Measurement unit of postural stability and knee muscle strength was degrees and Newton meter per kilogram, respectively
  3. ACL anterior cruciate ligament, APSI anterior–posterior stability index, CI confidence interval, LM lateral meniscus, MD mean difference, MLSI medial–lateral stability index, MM medial meniscus, OSI overall stability index
  4. aStatistically significant