Table 1. Participant characteristics –
numbers of participants in each racial/ethnic category are reported along with population weighted percentages.
| Overall n | Non-Hispanic- White n (%) | Non-Hispanic- Black n (%) | Hispanic n (%) | Mean Age, years (95% CI) | Male (%) | |
|---|---|---|---|---|---|---|
| 1999–2000 | 878 | 203 (62.6) | 232 (15.0) | 441 (22.4) | 15.9 (15.6, 16.3) | 54.3 |
| 2001–2002 | 887 | 292 (69.8) | 272 (14.8) | 321 (15.4) | 16.0 (15.6, 16.3) | 46.5 |
| 2003–2004 | 872 | 243 (66.9) | 330 (16.5) | 290 (16.6) | 16.1 (15.8, 16.5) | 52.7 |
| 2005–2006 | 815 | 222 (68.8) | 274 (15.2) | 315 (16.1) | 16.0 (15.8, 16.2) | 53.9 |
| 2007–2008 | 420 | 148 (66.5) | 100 (14.4) | 172 (19.2) | 16.1 (15.8, 16.3) | 51.5 |
| 2009–2010 | 526 | 182 (62.7) | 108 (16.1) | 226 (21.2) | 15.8 (15.6, 16.1) | 51.5 |
| 2011–2012 | 439 | 138 (61.0) | 167 (17.0) | 130 (22.) | 15.9 (15.5, 16.3) | 52.4 |
| Total | 4837 | 1435 (65.6) | 1491 (15.6) | 1911 (18.8) | 16.0 (15.9, 16.1) | 51.7 |