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Table 4 Odds Ratios (ORs) of lung cancer associated with ETS from outside homes (vehicle, public places, work)

From: Exposure to environmental tobacco smoke (ETS) and risk of lung cancer in Montreal: a case–control study

  All subjects Self-respondents only
  Controls Cases     Controls Cases    
  Categories N=436 N=44 OR* 95%CI N=410 N=32 OR* 95%CI
  Never 175 16 1 (ref.) 160 8 1 (ref.)
  Ever 261 28 1.51 0.75 3.05 250 24 1.95 0.84 4.54
Duration           
  <= 64 (hrs/d x yrs) 146 16 1.47 0.68 3.19 141 12 1.74 0.69 4.42
  >64 (hrs/d x yrs) 115 12 1.57 0.65 3.81 109 12 2.30 0.85 6.19
Duration           
  <=1 pack-year 124 16 1.70 0.78 3.69 119 12 2.05 0.81 5.22
  >1 pack-year 137 12 1.28 0.54 3.03 131 12 1.84 0.70 4.85
  1. *Adjusted for sex, age, median income, and proxy (if applicable).