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Table 1 Demographic characteristics of the urban sample China, 2011

From: Second hand smoke exposure in public venues and mental disorder: a representative nationwide study of China

Group

Number

% of sample

Age (years)

 < 25

2110

15.0

 25–34

3061

20.8

 35–44

2537

19.4

 45–54

1620

20.3

 55+

1878

25.5

Gender

 Male

3747

28.6

 Female

7459

78.8

Ethnicity

 Han

9776

89.7

 Other

1430

10.3

Education

 Elementary school or less

634

5.3

 Junior high school

2390

18.3

 High school

4089

37.4

 Junior college or more

4093

39.0

Occupation

 Managers and clerks

576

4.2

 Professionals

580

4.1

 Commerce and service

1254

10.0

 Operations

2811

22.5

 Students

1841

24.7

 Retired

1319

8.5

 Other

2825

25.9

Income/person/year (Yuan)

 < 10,000

1416

12.9

 10,000–19,999

3130

24.8

 20,000–29,999

3103

26.1

 30,000–39,999

1413

14.6

 40,000–49,999

990

10.2

 50,000+

1154

11.5

Region location

 East

4556

51.6

 Middle

1664

9.9

 West

4986

38.6