Table 8

Odds ratios (95% CI) of respiratory symptoms with relation to fibre exposure intensity and years of exposure (adjusted for factory, age, gender, and smoking habits)

Years of exposure
Fibre exposure (mg/m3)0 to ≤15>15
For sinusitis no odds ratios could be calculated due to too few cases in the subgroups.
Dry nose
    >0.3 9.2 (1.8 to 48.5)22.2 (4.7 to 104.5)
    0 to ≤0.3 5.6 (1.9 to 16.8) 6.6 (2.2 to 19.4)
Blocked nose
    >0.3 7.2 (1.3 to 57.7)17.5 (4.1 to 125.4)
    0 to ≤0.311.2 (2.9 to 74.7)17.4 (4.8 to 112.9)
Mucosal irritation
    >0.3 2.8 (0.8 to 10.6) 6.5 (2.2 to 22.2)
    0 to ≤0.3 1 (reference) 2.7 (1.3 to 5.8)
Dry cough
    >0.3 2.4 (0.6 to 10.8) 3.1 (1.3 to 8.0)
    0 to ≤0.3 1 (reference) 2.0 (0.9 to 4.4)
Nose bleeding
    >0.3 1.5 (0.3 to 9.9) 2.8 (0.7 to 15.2)
    0 to ≤0.3 4.1 (1.3 to 20.1) 2.2 (0.6 to 10.6)
Chronic bronchitis
    >0.3 0.9 (0.3 to 1.7) 1.1 (0.4 to 3.5)
    0 to ≤0.3 0.6 (0.2 to 1.7) 1.8 (0.8 to 4.7)
Asthma
    >0.3 6.4 (0.6 to 112.3) 0.9 (0.03 to 15.4)
    0 to ≤0.3 1.8 (0.3 to 14.3) 2.6 (0.5 to 20.2)
Pneumonia
    >0.3 0.8 (0.2 to 2.8) 0.5 (0.2 to 1.8)
    0 to ≤0.3 1.1 (0.4 to 3.1) 0.9 (0.4 to 2.3)
Acute bronchitis
    >0.3 1.0 (0.2 to 7.0) 1.0 (0.2 to 6.0)
    0 to ≤0.3 0.7 (0.2 to 2.5) 1.1 (0.4 to 3.7)