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Table 2 Distribution of workers in mill departments and exposure frequency in these departments among pulp mill workers in the cohort

From: Incidence of chronic bronchitis in a cohort of pulp mill workers with repeated gassings to sulphur dioxide and other irritant gases

Work departments in pulp mills

Unexposed

Exposed but no gassings

Few episodes of gasssings

Frequent gassings

% (N) in department

% (N) in department

% (N) in department

% (N) in department

All departments, 100% (N = 3060)

51,8% (1,584)

8,5% (259)

28,3% (866)

11,5% (351)

Office ever, 12.8% (N = 391)

73.7% (288)

5.9% (23)

15.9% (62)

4.6% (18)

Office only, 9.4% (N = 289)

86.5% (250)

3.1% (9)

9.0% (26)

1.4% (4)

Wood preparation ever, 10.8% (N = 330)

44.6% (147)

8.8% (29)

31.8% (105)

14.9% (49)

Pulp production ever, 25.6% (N = 783)

21.1% (165)

12.1% (95)

41.8% (327)

25.0% (196)

---Digester ever, 12.2% (N = 372)

17.7% (66)

12.9% (48)

39.3% (146)

30.1% (112)

---Bleachery ever, 6.1% (N = 186)

9.7% (18)

12.9% (24)

46.8% (87)

30.7% (57)

Maintenance ever, 24.5% (N = 749)

45.1% (338)

10.2% (76)

33.4% (250)

11.4% (85)

Paper production ever, 32.6% (N = 997)

56.8% (566)

6.4% (64)

27.3% (272)

9.5% (95)

Paper production only, 17.8% (N544)

75.0% (408)

3.7% (20)

17.8% (97)

3.5% (19)

Not specified, 11.8% (N = 360)

61.4% (221)

6.7% (24)

21.7% (78)

10.3% (37)

  1. 66.6% have been working in sulphite mills.