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Table 5 Odds ratio for lung cancer associated with occupational exposure to wood dust by histological types

From: Occupational exposure to wood dust and risk of lung cancer in two population-based case–control studies in Montreal, Canada

   Squamous cell Small cell Adenocarcinoma Large cell and others
  Controls Cases OR* 95% CI Cases OR* 95% CI Cases OR* 95% CI Cases OR* 95% CI
Study I Population controls                 
No exposure 389 255 1.0 (ref) 116 1.0 (ref) 131 1.0 (ref) 128 1.0 (ref)
Any level of exposure 144 104 0.8 0.5 1.2 43 0.7 0.4 1.2 36 0.5 0.3 0.8 44 0.7 0.4 1.1
Non-subst. level 74 49 0.8 0.5 1.2 19 0.6 0.3 1.2 21 0.7 0.4 1.2 24 0.7 0.4 1.3
Substantial level 70 55 0.8 0.5 1.4 24 0.8 0.4 1.5 15 0.3 0.2 0.7 20 0.6 0.3 1.1
Study I Cancer Controls             
No exposure 1072 255 1.0 (ref) 116 1.0 (ref) 131 1.0 (ref) 128 1.0 (ref)
Any level of exposure 272 104 1.3 0.9 1.8 43 1.2 0.7 1.8 36 1.0 0.6 1.5 44 1.1 0.7 1.7
Non-subst. level 161 49 1.0 0.7 1.5 19 0.9 0.5 1.5 21 1.0 0.6 1.7 24 1.0 0.6 1.7
Substantial level 116 55 1.7 1.1 2.6 24 1.6 0.9 2.8 15 0.9 0.5 1.7 20 1.2 0.7 2.1
Study II Population Controls             
No exposure 640 166 1.0 (ref) 87 1.0 (ref) 171 1.0 (ref) 77 1.0 (ref)
Any level of exposure 254 95 1.2 0.8 1.7 38 0.8 0.5 1.3 70 1.1 0.8 1.7 32 1.1 0.7 1.9
Non-subst. level 201 72 1.1 0.8 1.7 26 0.6 0.3 1.1 50 1.0 0.6 1.5 19 0.8 0.5 1.5
Substantial level 53 23 1.3 0.7 2.5 12 1.8 0.8 4.3 20 1.9 1.0 3.7 13 2.7 1.2 6.0
  1. *adjusted for age, ethnolinguistic group, years of education, median family income, respondent status, cigarette index and IARC Group 1 known carcinogens (asbestos, diesel exhaust, formaldehyde, cadmium, chromium VI, nickel and silica).