TABLE 1—
Sociodemographic Characterisitics of Participants in the US Physical Activity Study, 1999–2000
| Characteristic | Sample, No. (%) | US Census,%a |
| Sex | ||
| Female | 1220 (67.1) | 51.1 |
| Male | 598 (32.9) | 48.9 |
| Age group, y | ||
| 18–29 | 487 (26.8) | 21.8 |
| 30–44 | 548 (30.1) | 31.9 |
| 45–64 | 479 (26.3) | 29.2 |
| 65+ | 295 (16.2) | 17.1 |
| Missing/unknown | 9 (0.5) | … |
| Race/ethnicity | ||
| White | 971 (53.4) | 82.4 |
| Black | 546 (30.0) | 12.8 |
| Other | 295 (16.2) | 4.8 |
| Missing/unknown | 6 (0.4) | … |
| Household income, $ | ||
| <10 000 | 347 (19.1) | 9.2 |
| 10 000 to < 20 000 | 548 (20.8) | 14.5 |
| 20 000 to < 35 000 | 391 (21.5) | 19.6 |
| ≥35 000 | 502 (27.6) | 56.7 |
| Missing/unknown | 200 (11.0) | … |
| Education | ||
| Less than high school | 330 (18.2) | 11.6 |
| High school | 547 (30.1 | 31.9 |
| Some college | 521 (28.7) | 21.4 |
| College | 419 (23.0) | 35.1 |
| Missing/unknown | 1 (< 0.1) | … |
a1999 estimated US census figures for persons 18 years or older.