# of pt.

# of extr. MTPS

% of extr. MPTS

# of extr. LTPS

% extr. LTPS

# of extr. PTS

% extr. PTS

All patients

416

8

1.9

19

4.6

21

5.0

ACL tear group

63

1

1.6

3

4.8

5

7.9

Injury mechanism

Non-traumatic

48

1

2.1

1

2.1

3

6.3

Traumatic

15

0

0

2

13.3

2

13.3

Meniscal injury group

71

2

2.8

9

12.7

4

5.6

Injury mechanism

Non-traumatic

61

2

3.3

9

14.8

4

6.6

Traumatic

10

0

0

0

0

0

0

Healthy control group

282

5

1.8

7

2.5

12

4.3

Injury mechanism

Non-traumatic

151

0

0

3

2.0

12

7.9

Traumatic

131

5

3.8

4

3.1

0

0