Sample characteristics
|
Sample size (unweighted) | 251 | 194 | – |
Estimated population (weighted) | 2,235,392 | 2,515,535 | – |
Personal characteristics
|
Age, mean (SE) | 42.3 (1.4) | 42.4 (1.7) | 0.96 |
Sex (% female) | 71% | 61% | 0.10 |
Race/ethnicity | | | 0.11 |
White, non-Hispanic (%) | 76% | 85% | |
African-American (%) | 17% | 12% | |
Mexican-American (%) | 6% | 3% | |
Socioeconomic/smoking variables
|
Previous cigarette smoking (%) | 36% | 34% | 0.77 |
Education, mean years (SE) | 12.7 (0.4) | 13.0 (0.3) | 0.48 |
Poverty-income ratio, mean (SE) | 3.0 (0.2) | 3.3 (0.2) | 0.37 |
Housing/geographic factors
|
Age of home | | | 0.0006 |
<1946 | 37% | 13% | |
1946–73 | 40% | 41% | |
>1974 | 16% | 40% | |
Unknown or not reported | 7% | 6% | |
Rural location (%) | 38% | 59% | 0.003 |
Geographic location | | | 0.09 |
Northeast (%) | 28% | 18% | |
South (%) | 22% | 21% | |
Midwest (%) | 21% | 17% | |
West (%) | 29% | 44% | |
Lives with ⩾1 smokers (%) | 18% | 13% | 0.39 |
Gas heating system (%) | 61% | 34% | 0.006 |