Table 1

Demographics of subject counties (based on respondents only), California (from CHIS 2001) and the entire USA (from the 2001 National Health Interview Survey [34]).

Variable

Los Angeles*

San Diego*

Combined*

California*

USA

Area (sq.km)

12,308

11,721

24,039

410,000

9,631,000

Population

9,662,000

2,813,000

12,475,000

34,400,000

285,000,000

Sample size

8,547

1,891

10,438

56,270

69,244

Gender (%)

M

50.7 (0.4)

50.3 (0.7)

50.6 (0.3)

48.9 (0.0)

47.9 (0.1)

F

49.3 (0.4)

49.7 (0.7)

49.4 (0.7)

51.1 (0.0)

52.1 (0.1)

Race/ethnicity (%)

Non-Hispanic White

39.4 (0.4)

61.2 (0.8)

44.6 (0.3)

50.2 (0.0)

73.6 (0.4)

Non-Hispanic Black

9.9 (0.2)

5.1 (0.5)

8.8 (0.2)

5.9 (0.0)

11.2 (0.3)

Hispanic

38.2 (0.4)

22.8 (0.8)

34.5 (0.4)

29.3 (0.0)

10.6 (0.2)

Other

12.5 (0.3)

10.8 (0.6)

12.1 (0.2)

14.5 (0.0)

4.6 (0.2)

Age

18-39

47.6 (0.4)

47.3 (0.8)

47.5 (0.4)

45.7 (0.0)

39.6 (0.3)

40-59

33.7 (0.4)

32.8 (0.7)

33.5 (0.4)

34.9 (0.1)

38.1 (0.3)

60+

18.8 (0.3)

19.8 (0.8)

19.0 (0.3)

19.4 (0.1)

22.3 (0.2)

Income (% of poverty level)

< 100

17.2 (0.5)

10.6 (1.0)

15.6 (0.4)

15.7 (0.2)

10.0 (0.2

100-200

21.7 (0.6)

21.0 (1.2)

21.5 (0.6)

20.4 (0.3)

16.8 (0.3

200-300

14.0 (0.5)

14.2 (1.0)

14.0 (0.5)

14.2 (0.2)

17.2 (0.3

300+

47.2 (0.7)

54.2 (1.5)

48.8 (0.7)

49.7 (0.2)

56.0 (0.4

Education (%)

<HS

20.9 (0.7)

14.6 (1.1)

20.9 (0.5)

21.4 (0.1)

16.7 (0.2)

HS graduate

23.2 (0.5)

25.0 (1.2)

23.2 (0.5)

23.3 (0.1)

30.5 (0.3)

> HS

55.9 (0.7)

60.4 (1.3)

55.9 (0.6)

55.3 (0.2)

52.8 (0.4)

Berrigan et al. International Journal of Health Geographics 2010 9:20   doi:10.1186/1476-072X-9-20