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Occup Environ Med 57:268-273 doi:10.1136/oem.57.4.268
  • Paper

Symptoms, airway responsiveness, and exposure to dust in beech and oak wood workers

Table 5

Bronchial responsiveness in historical controls (HC) and in the study group stratified by exposure to wood dust expressed in terms of the cumulative dust exposure index

Variable HC Exposure (y.mg/m3) p Value5-150 p Value5-151
0 ⩽70 70–110 110–160 <160
n 200 13 28 28 25 33
MBC+ n (%) 20  (10) 1  (8) 4  (14.3) 6  (21.4) 6  (21.4) 9  (27.3) 0.775-152 0.0025-152
DRS  (mean (SD)) 0.28 (0.08) 0.31 (0.08) 0.27 (0.07) 0.25 (0.08) 0.25 (0.09) 0.24 (0.1) 0.045-153 0.0145-153
  • 5-150 HC excluded from the analysis.

  • 5-151 HC included in the analysis.

  • 5-152 Logistic regression after adjustment for baseline FEV1and age.

  • 5-153 Linear regression after adjustment for FEV1 and age.

  • MBC+=decline in FEV1 by ⩾20%; DRS=1/(% decline in FEV1/μmol +2.5).

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