Table 3

Characteristics of workers and their years of exposure in different mean exposure levels of soft paper dust among included workers divided on high-exposed and low-exposed women and men

High exposed to dust ≥5 years >5 mg/m3 Low exposed to paper dustTotal cohort
WomenMenWomenMen
Included workers, N478648264940957870
Age at hire, mean (SD)30 (12)28 (12)27 (11)27 (12)27 (12)
Employment time, mean (SD)18 (10)23 (13)8 (8)13 (13)12 (12)
Follow-up person-years, sum19 51626 80096 289146 107288 713
Ever exposed to >5 mg/m3, N4786486097032438
Years >5 mg/m3, mean (SD)11.5 (6.3)15.3 (11.6)2.3 (1.2)2.2 (1.2)7.5 (8.5)
Cumulative dust exposure mg/m3 years, mean (SD)116 (75)149 (117)19 (20)16 (23)34 (60)
Numbers of workers (N) and years (mean) exposed to different levels of total dust
Exposed to mean 0.01 mg/m3, N8136086167
Years 0.01 mg/m3, mean (SD)5.4 (5.5)7.2 (5.8)9.3 (9.7)11.9 (9.9)10.3 (9.5)
Exposed to mean 0.1 mg/m3, N9501919181168
Years 0.1 mg/m3, mean (SD)3.6 (6.4)9.8 (7.5)6.6 (8.1)12.7 (13)11.5 (12)
Exposed to mean 0.5 mg/m3, N3712024916712077
Years 0.5 mg/m3, mean (SD)8.6 (7.3)10.1 (10)6.7 (6.7)11.9 (13)11.1 (12)
Exposed to mean 1.5 mg/m3, N21220592010942431
Years 1.5 mg/m3, mean (SD)9.8 (7.8)8.5 (7.5)7.3 (6.9)7.7 (7.7)7.8 (7.4)
Exposed to mean 3 mg/m3, N251252140612063115
Years 3 mg/m3, mean (SD)5.3 (2.8)6.8 (5.7)6.4 (6.7)8.2 (11)7.0 (8.3)
Exposed to mean 7 mg/m3, N4275845006192130
Years 7 mg/m3, mean (SD)9.9 (5.5)13.1 (10)2.2 (1.2)2.2 (1.2)6.7 (7.6)
Exposed to mean 15 mg/m3, N166189195114664
Years 15 mg/m3, mean (SD)7.5 (7.2)12.0 (11)1.8 (1.0)2.0 (1.2)6.2 (8.1)
  • Every worker can be exposed to several different exposure levels during their employment. Mean cumulative dust exposure is also given.

  • SD, standard deviation.