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Table 1 General characteristics of the study subjects from the 2005 Korea National Health and Nutrition Examination Study

From: Exposure to environmental tobacco smoke among South Korean adults: a cross-sectional study of the 2005 Korea National Health and Nutrition Examination Survey

 

Male

Female

Total

 

n

%

n

%

n

%

Sex

      

   Male

    

3509

45.0

   Female

    

4292

55.0

Age groups (years)

      

   19-29

583

16.6

753

17.5

1336

17.1

   30-39

811

23.1

930

21.7

1741

22.3

   40-49

872

24.9

1006

23.4

1878

24.1

   50-59

579

16.5

650

15.1

1229

15.8

   60-69

445

12.7

525

12.2

970

12.4

   70+

219

6.2

428

10.0

647

8.3

Education

      

   College & above

526

15.3

1214

28.8

1740

22.7

   High

376

10.9

476

11.3

852

11.1

   Middle

1449

42.1

1594

37.8

3043

39.7

   Elementary & less than

1093

31.7

935

22.2

2028

26.5

Income

      

   1(highest)

901

26.0

1097

25.8

1998

25.9

   2

890

25.7

1097

25.8

1987

25.8

   3

830

24.0

1028

24.2

1858

24.1

   4(lowest)

843

24.3

1028

24.2

1871

24.3

Location of residence

      

   Rural

715

20.4

849

19.8

1564

20.1

   Urban

2794

79.6

3443

80.2

6237

80.0

Marital status

      

   Never married

746

21.3

672

15.7

1418

18.2

   Married

2533

72.3

2781

64.8

5314

68.2

   Others

227

6.5

836

19.5

1063

13.7

Smoking Status

      

   Non-smoker

696

19.8

3929

91.5

4625

59.3

   Ex-smoker

999

28.5

123

2.9

1122

14.4

   Current smoker

1814

51.7

240

5.6

2054

26.3