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Table 2 The association between ETS and risk of lung cancer among never smokers in a population based case-control study, Greater Toronto Area, Ontario, 1997-2002

From: Lung cancer risk in never-smokers: a population-based case-control study of epidemiologic risk factors

 

Total Population n = 1393

 

Never smokers n = 622

 
 

Case, n

Control, n

ORa

95%CI

Case, n

Control, n

ORb

95%CI

 

445

948

  

156

466

  

ETS Exposure

        

   None

29

88

Refc

 

23

68

Refd

 

   At home Adult and/or Child

375

772

1.2

0.7-1.9

109

341

1.1

0.6-1.9

Childhood

333

672

1.1

0.7-1.9

93

298

1.0

0.6-1.8

Adulthood

226

439

1.0

0.6-1.7

50

247

1.0

0.5-2.0

   At work

259

463

1.3

0.9-1.9

69

179

1.2

0.7-2.1

< 10 years

73

194

1.1

0.8-1.6

32

90

1.3

0.8-2.2

> 10 years

176

261

1.2

0.9-1.6

37

86

1.2

0.7-2.0

   At both home and work

226

405

1.4

0.9-2.2

50

142

1.2

0.7-2.1

  1. aOR is adjusted for pack-years of smoking, age, sex, education and ethnicity
  2. bOR is adjusted for age, sex, education and ethnicity
  3. cReference group consists of all participants with no ETS exposure
  4. dReference group consists of never-smokers with no ETS exposure