Table 3 12-month symptom prevalence (bold font) with 95% confidence interval (95%-CI) and total number of affected employees classified according to age groups. (prev.=prevalence)

Female, n = 379

66.0

61.2, 70.7

250

45.6

40.6, 50.7

173

15.6

11.9, 19.2

59

24.5

20.2, 28.9

93

63.6

53.6, 73.7

56

39.8

29.5, 50.0

35

12.5

5.6, 19.4

11

28.4

19.0, 37.8

25

68.9

60.6, 77.2

82

41.2

32.3, 50.0

49

12.6

6.6, 18.6

15

23.5

15.9, 31.2

28

67.3

58.4, 76.2

72

50.5

41.0, 59.9

54

18.7

11.3, 26.1

20

20.6

12.9, 28.2

22

62.5

50.6, 74.4

40

54.7

42.5, 66.9

35

20.3

10.4, 30.2

13

28.1

17.1, 39.1

18

Male, n = 678

48.1

44.3, 51.9

326

32.8

29.3, 36.3

223

14.8

12.1, 17.5

100

18.9

16.0, 21.8

128

41.3

30.5, 52.1

33

20.0

11.2, 28.8

16

11.3

4.4, 18.2

9

8.8

2.6, 15.0

7

49.2

42.9, 55.5

120

30.7

24.9, 36.5

75

11.1

7.2, 15.0

27

20.1

15.1, 25.1

49

48.6

42.0, 55.2

107

36.4

30.0, 42.8

80

16.8

11.9, 21.7

37

19.5

14.3, 24.7

43

51.6

42.9, 60.3

66

40.6

32.1, 49.1

52

20.1

13.2, 27.0

27

22.7

15.4, 30.0

29

54.5

51.5, 57.5

576

37.5

34.6, 40.4

396

15.0

12.8, 17.2

159

20.9

18.4, 23.4

221