Demographic composition of experimental groups
| Arm 1 (n=1001) (%) | Arm 2 (n=1000) (%) | Arm 3 (n=990) (%) | Arm 4 (n=1005) (%) | Overall (n=3996) (%) | |
|---|---|---|---|---|---|
| No statistical differences were found using a χ2 test to test for differences between the four arms. | |||||
| Age (years) | |||||
| 18–24 | 10.9 | 10.2 | 10.7 | 10.5 | 10.6 |
| 25–34 | 21.8 | 21.1 | 21.3 | 18.2 | 20.6 |
| 35–44 | 20.9 | 20.0 | 19.4 | 23.5 | 21.0 |
| 45–54 | 18.1 | 19.2 | 16.8 | 21.1 | 18.8 |
| 55–64 | 10.3 | 12.9 | 11.8 | 11.5 | 11.6 |
| 65+ | 18.2 | 16.7 | 20.0 | 15.2 | 17.5 |
| Sex and race | |||||
| White male | 26.8 | 26.2 | 24.9 | 26.1 | 26.0 |
| African American male | 2.4 | 1.9 | 1.7 | 2.5 | 2.1 |
| Hispanic male | 10.3 | 10.4 | 9.4 | 10.5 | 10.1 |
| Asian/other male | 3.1 | 3.8 | 3.3 | 3.9 | 3.5 |
| White female | 37.6 | 36.4 | 35.7 | 35.2 | 36.2 |
| African American female | 3.1 | 4.4 | 4.1 | 4.2 | 4.0 |
| Hispanic female | 12.7 | 12.6 | 16.5 | 14.0 | 13.9 |
| Asian/other female | 4.1 | 4.4 | 4.4 | 3.7 | 4.2 |
| Education | |||||
| Less than high school | 13.9 | 13.2 | 15.5 | 12.2 | 13.7 |
| High school graduate | 26.0 | 22.9 | 22.4 | 24.3 | 23.9 |
| Some college | 26.5 | 30.0 | 28.5 | 27.1 | 28.0 |
| College graduate | 33.7 | 34.0 | 33.6 | 36.4 | 34.4 |