Table 2: Prevalence of MRI-detected cartilage lesions in the total knee among 92 male danish floor layers and 49 male danish graphic designers.

 

Lesions of the knee

Either knee

Left knee

Right knee

Occupation

Total

Occupation

Total

Occupation

Total

Floor layers

Graphic designers

Fisher’s exact

Floor layers

Graphic designers

Fisher’s exact1

Floor layers

Graphic designers

Fisher’s exact1

N

%

N

%

P

N

%

N

%

N

%

P

 

 

N

%

N

%

P

N

%

Max lesion score of the knee

 

 

 

 

0.64

 

 

 

 

 

 

0.81

 

 

 

 

 

 

0.30

 

 

0

37

40.2

16

32.7

 

53

37.6

46

50.0

21

42.9

 

67

47.5

50

54.3

22

44.9

 

72

51.1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1.1

 

 

 

1

0.7

2

9

9.8

4

8.2

 

13

9.2

11

12.0

6

12.2

 

17

12.1

4

4.3

2

4.1

 

6

4.3

3

6

6.5

3

6.1

 

9

6.4

6

6.5

4

8.2

 

10

7.1

6

6.5

4

8.2

 

10

7.1

4

9

9.8

4

8.2

 

13

9.2

3

3.3

4

8.2

 

7

5.0

8

8.7

1

2.0

 

9

6.4

5

10

10.9

4

8.2

 

14

9.9

9

9.8

3

6.1

 

12

8.5

6

6.5

3

6.1

 

9

6.4

6

6

6.5

9

18.4

 

15

10.6

7

7.6

6

12.2

 

13

9.2

5

5.4

9

18.4

 

14

9.9

7

13

14.1

8

16.3

 

21

14.9

8

8.7

5

10.2

 

13

9.2

11

12.0

6

12.2

 

17

12.1

8

2

2.2

1

2.0

 

3

2.1

1

1.1

 

 

 

1

0.7

1

1.1

1

2.0

 

2

1.4

Missing

 

 

 

 

 

 

 

1

1.1

 

 

 

1

0.7

 

 

1

2.0

 

1

0.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Max score  ≥ 3

 

 

 

 

0.38

 

 

 

 

 

 

0.47

 

 

 

 

 

 

0.29

 

 

Yes

46

50.0

29

59.2

 

75

53.2

34

37.0

22

44.9

 

56

39.7

37

40.2

24

49.0

 

61

43.3

No

46

50.0

20

40.8

 

66

46.8

57

62.0

27

55.1

 

84

59.6

55

59.8

24

49.0

 

79

56.0

Missing

 

 

 

 

 

 

 

1

1.1

 

 

 

1

0.7

 

 

1

2.0

 

1

0.7

Total

92

100

49

100

 

141

100

92

100

49

100

 

141

100

92

100

49

100

 

141

100

 

1Fisher’s exact test of the association between occupation and severe knee cartilage lesions among observations with non-missing cartilage lesions.