Table 6

Associations between indices of asthma and risk factors among woodworkers; OR (95% CI) in logistic regression analyses, stratified by atopy

Stratification by atopyAsthma symptoms (n = 247)*Work related asthma symptoms (n = 136)*Asthma symptoms + BHR (n = 118)*Clinical asthma (n = 181)*
Variables included in the final models are identical to those stated in table 5.
*Numbers in the final model.
+ atopy
Wood dust, 0.80–0.992.331.918.692.40
mg/m3, ref. <0.80(0.58–9.33)(0.20–18.38)(0.47–159.82)(0.47–12.33)
Wood dust, 1.0–1.39 mg/m3,1.960.533.502.27
ref. <0.80(0.56–6.81)(0.04–7.23)(0.19–64.96)(0.53–9.64)
Wood dust, >1.39 mg/m3,2.871.4822.941.65
ref. <0.80(0.59–13.83)(0.10–21.44)(1.01–523.57)(0.29–9.44)
− atopy
Wood dust, 0.80–0.990.836.722.321.60
mg/m3, ref. <0.80(0.25–2.73)(0.51–89.22)(0.04–149.82)(0.31–8.28)
Wood dust, 1.0–1.39 mg/m3,0.936.834.501.75
ref. <0.80(0.30–2.91)(0.44–105.49)(0.04–456.70)(0.40–7.63)
Wood dust, >1.39 mg/m3,2.0420.252.504.28
ref. <0.80(0.70–5.97)(1.68–244.33)(0.02–292.61)(1.00–18.31)