Table 1 Selected characteristics of lung cancer cases and community referents in nonsmoking Chinese men during 2004–2006

From: Silica dust, diesel exhaust, and painting work are the significant occupational risk factors for lung cancer in nonsmoking Chinese men

 

Cases

Community referents

 

Characteristics by category

No.

%

No.

%

P- value a

Total no.

132

 

536

  

Age at interview (year)

0.038

 <50

22

16.7

63

11.8

 

 50–59

36

27.3

108

20.1

 

 60–69

40

30.3

166

31.0

 

70

34

25.8

199

37.1

 

Family monthly income (HK dollar) b

0.001

 <4000

55

41.7

202

37.7

 

4000

54

40.9

157

29.3

 

 Not answered

23

17.4

177

33.0

 

Marital status

0.351

 Single

8

6.1

38

7.1

 

 Married

115

87.1

450

84.0

 

 Widowed

2

1.5

23

4.3

 

 Divorced

7

5.3

19

3.5

 

Education level

0.681

 Illiterate

14

10.6

54

10.1

 

 Primary

47

35.6

163

30.4

 

 High school

46

34.8

201

37.5

 

 College or above

24

18.2

107

20.0

 

ETS in workplace or at home

0.613

 Never

42

31.8

183

34.1

 

 Ever

90

68.2

353

65.9

 

Alcohol drinking c

0.120

 Never

69

52.3

333

62.1

 

 Occasional

34

25.8

110

20.5

 

 Frequent

28

21.2

90

16.8

 
  1. Abbreviations: ETS=environmental tobacco smoke; HK=Hong Kong.
  2. aP-value from Person’s χ2 test.
  3. b1 US dollar=7.8 HK dollar.
  4. cOccasional drinkers referred to those who drank at most three times per week and frequent drinkers referred to those who drank four times or more per week.