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Table 2 Medial meniscus extrusion in subgroups

From: Extrusion of the anterior segment of the medial meniscus extrusion initiates knee osteoarthritis: evaluation using magnetic resonance imaging

 

P1 a

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

P12

P13

Anterior segment

Middle segment

Posterior segment

Group En

 Mean

0.8

3.6

3.5

3.6

3.7

3.4

3.6

3.4

2.3

0.9

−1.0

−3.7

−5.8

 SD b

1.9

2.2

1.4

1.4

1.4

1.4

0.8

1.3

1.6

1.9

2.5

2.6

1.0

Group Ep

 Mean

2.3

4.5

4.5

4.4

4.6

4.6

4.4

4.4

3.7

2.2

−0.1

−0.2

−2.8

 SD b

2.5

1.7

1.6

1.5

1.4

1.4

1.5

1.4

1.8

2.9

3.5

2.6

2.8

Group Ap

 Mean

2.4

3.5

4.9

5.2

5.6

5.8

5.6

5.4

5.3

3.9

1.9

−0.1

−3.0

 SD b

2.2

2.4

2.0

1.8

2.4

1.8

2.2

2.8

3.1

3.5

3.7

4.3

3.5

Group C

 Mean

1.1

1.3

2.3

2.5

2.8

2.9

2.6

2.2

0.7

−0.51

−2.5

−3.6

−3.9

 SDb

2.1

1.8

1.9

1.5

1.5

1.1

1.2

1.7

2.0

2.7

2.8

2.5

2.2

En vs c Ep

P value

0.038

0.31

0.12

0.18

0.26

0.011

0.21

0.18

0.086

0.25

0.68

0.11

0.18

Ep vs Ap

P value

0.99

0.52

0.79

0.13

0.11

0.0085

0.013

0.13

0.026

0.068

0.058

0.21

0.85

En vs C

P value

0.97

0.0033

0.099

0.14

0.32

0.56

0.17

0.24

0.10

0.43

0.49

0.99

0.84

  1. Boldface text indicates statistical significance
  2. Group E, non- or early osteoarthritis group; Group A, advanced osteoarthritis group; Group C, control group; Group En, non- or early osteoarthritis without meniscus tear; Group Ep, non- or early osteoarthritis with meniscus tear; Group An, advanced osteoarthritis and without meniscus tear; Group Ap, advanced osteoarthritis and with meniscus tear.
  3. aP1, on radial MRI coronal slices were made radially from the anterior to posterior horns of medial meniscus, with the anterior horn slice as position 1 and the posterior horn slice as position 13
  4. bSD, Standard deviation
  5. cvs, versus