Table 2 Occupational exposure in the random sample and asthma cohort
VariableRandom sampleAsthma cohort
Respiratory work disabilityRespiratory work disability
NoYesNoYes
No65887174138
Any exposure
    None3635 (55.2)24 (33.8)412 (55.6)18 (47.4)
    Low1997 (30.3)27 (38.0)236 (31.9)12 (31.6)
    High956 (14.5)20 (28.2)93 (12.6)8 (21.1)
Biological dust
    None4715 (71.6)46 (64.8)530 (71.5)24 (63.2)
    Low1617 (24.5)21 (29.6)188 (25.4)11 (29.0)
    High256 (3.9)4 (5.6)23 (3.1)3 (7.9)
Exposure to mineral dust
    None5054 (76.7)39 (54.9)577 (77.9)28 (73.7)
    Low1073 (16.3)21 (29.6)118 (15.9)7 (18.4)
    High461 (7.0)11 (15.5)46 (6.2)3 (7.9)
Exposure to gases and fumes
    None3938 (59.8)29 (40.9)440 (59.4)18 (47.4)
    Low2077 (31.5)29 (40.9)234 (31.6)15 (39.5)
    High573 (8.7)13 (18.3)67 (9.0)5 (13.2)
Exposure to passive smoking at workplace (at baseline), n (%)1892 (28.7)20 (28.2)196 (26.5)13 (34.2)