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Table 4 The association between previous medical history and risk of lung cancer 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

  

Emphysema

        

   Never

414

940

1.0

Ref

154

465

1.0

Ref

   Ever

31

8

4.8

2.0-11.1

2

1

3.1

0.3-35.9

Chronic Bronchitis

        

   Never

424

899

1.0

Ref

153

440

1.0

Ref

   Ever

21

49

0.9

0.5-1.7

3

26

0.4

0.1-1.5

Asthma

        

   Never

388

835

1.0

Ref

140

408

1.0

Ref

   Ever

57

113

1.2

0.8-1.8

16

58

1.0

0.5-1.9

Pneumonia

        

   Never

434

913

1.0

Ref

151

456

1.0

Ref

   Ever

11

35

0.6

0.3-1.2

5

10

1.9

0.6-6.2

Tuberculosis

        

   Never

439

943

1.0

Ref

153

463

1.0

Ref

   Ever

6

5

2.6

0.7-9.2

3

3

2.2

0.4-12.5

Other respiratory illness

      

   Never

385

823

1.0

Ref

139

403

1.0

Ref

   Ever

60

125

1.1

0.8-1.6

17

63

0.9

0.5-1.7

  1. aOR is adjusted for pack-years of smoking, age, sex, education and ethnicity
  2. bOR is adjusted for age, sex, education and ethnicity