TABLE 1.
Participant characteristics*
| Characteristic | Participants | 2007 donors |
|---|---|---|
| Age (years) | ||
| 16–19 | 127 (6) | 15,123 (20) |
| 20–29 | 252 (12) | 12,087 (16) |
| 30–39 | 265 (13) | 11,501 (15) |
| 40–49 | 435 (21) | 14,845 (19) |
| 50–59 | 571 (27) | 14,310 (18) |
| 60 or more | 461 (22) | 9,619 (12) |
| Missing | 51 | 38 |
| Sex | ||
| Male | 1050 (51) | 38,274 (51) |
| Female | 1025 (49) | 39,249 (49) |
| Missing | 87 | 0 |
| Race and/or ethnicity | ||
| Caucasian | 1598 (76) | 52,252 (67) |
| Non-Caucasian | 508 (24) | 25,267 (33) |
| Missing | 56 | 4 |
| Education | ||
| High school or less | 181 (9) | 21,115 (27) |
| Some college or trade school | 646 (31) | 20,675 (27) |
| Completed college (bachelor’s degree) | 688 (33) | 19,722 (25) |
| Graduate school or higher | 600 (28) | 11,336 (15) |
| Missing | 47 | 4,675 |
| Number of donations in past 5 years | ||
| First-time | 113 (5) | 21,633 (28) |
| 1–3 times | 362 (17) | 17,487 (23) |
| 4–5 times | 277 (13) | 9,145 (12) |
| 6–10 times | 396 (19) | 11,514 (15) |
| 11–20 times | 427 (20) | 9,720 (13) |
| More than 20 times | 515 (25) | 8,024 (10) |
| Missing | 72 | 0 |
*
Data are reported as number (%).