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Table 2 Adjusted odds ratios of lung cancer in relation to occupational exposure to asbestos

From: Occupational exposure to asbestos and lung cancer in men: evidence from a population-based case-control study in eight Canadian provinces

Occupational exposure Cases Controls Odds ratioA and 95% CI Odds ratioB and 95% CI
Unexposed* 1448 1829 1.0 - 1.0 -
Ever exposed 233 224 1.31 1.07 – 1.59 1.28 1.02 – 1.61
Highest attained exposure       
 Unexposed 1448 1829 1.0 - 1.0  
 Low 194 200 1.22 0.99 – 1.51 1.17 0.92 – 1.50
 Medium / High 39 24 2.02 1.20 – 3.97 2.16 1.21 – 3.88
Total 1681 2053     
Duration of exposure (years)       
 < 10 88 68 1.68 1.21 – 2.33 1.60 1.10 – 2.33
 10 - < 20 46 50 1.08 0.74 – 1.69 0.89 0.56 – 1.42
 ≥ 20 87 103 1.05 0.78 – 1.42 1.18 0.84 – 1.66
  1. A – Adjusted for age, province,
  2. B – Adjusted for age, province, cigarette pack years, occupational exposure to diesel and silica, exposure to second hand smoke.