Table 1.
Demographic Characteristics of US Adults Aged 18 to 64 Years, NHANES 2009–2012
| Characteristic | Unweighted | Weighted |
|---|---|---|
| Age, ya | ||
| 18–24, No (%) | 1,653 (17.4) | 14.9 |
| 25–30, No (%) | 1,136 (11.9) | 12.8 |
| 31–40, No (%) | 1,942 (20.4) | 20.4 |
| 41–50, No (%) | 1,951 (20.5) | 22.3 |
| 51–64, No (%) | 2,846 (29.9) | 29.6 |
| Mean (SD), y | 40.8 (14.1) | 41.1 (11.7) |
| Race/ethnicitya | ||
| Mexican American, No (%) | 1,541 (16.2) | 9.2 |
| Other Hispanic, No (%) | 1,019 (10.7) | 6.2 |
| Non-Hispanic white, No (%) | 3,645 (38.3) | 64.5 |
| Non-Hispanic black, No (%) | 2,201 (23.1) | 12.2 |
| Other, No (%)b | 1,122 (11.8) | 7.9 |
| Sexa | ||
| Male, No (%) | 4,656 (48.9) | 49.2 |
| Female, No (%) | 4,872 (51.1) | 50.8 |
| Income-to-poverty ratioc | ||
| <1 (<100% federal poverty level) | 2,308 (26.6) | 17.9 |
| Mean (SD) ratio | 2.4 (1.7) | 2.9 (1.4) |
Note: unweighted N = 9,528; weighted n = 193.7 million.
a
N = 9,528.
b
Includes Asian, Native American, multiracial, and all other populations.
c
n = 8,680.