Table 1:
Baseline characteristics of study donors by sex and age
| FEMALES | MALES | TOTAL | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 16yo | 17yo | 18yo | 19–49yo | 16yo | 17yo | 18yo | 19–49yo | FEMALE | MALE | ||
| N | 421 | 1,217 | 149 | 294 | 273 | 1,378 | 276 | 257 | 2,081 | 2,184 | |
| BLOOD CENTER* N | |||||||||||
| BCW | 421 | 529 | 82 | 111 | 273 | 477 | 111 | 93 | 1,143 | 954 | |
| ARC-CT | 0 | 688 | 67 | 183 | 0 | 901 | 165 | 164 | 938 | 1,230 | |
| RACE N (%) | |||||||||||
| Caucasian | 234 (56) | 754 (62) | 97 (65) | 220 (75) | 144 (53) | 832 (60) | 136 (49) | 180 (70) | 1,305 (63) | 1,292 (59) | |
| African-American | 19 (4.5) | 89 (7.3) | 10 (6.7) | 11 (3.7) | 15 (5.5) | 144 (10) | 36 (13) | 13 (5.1) | 129 (6.2) | 208 (9.5) | |
| Other / multi-race | 6 (1.4) | 65 (5.3) | 6 (4.0) | 3 (1.0) | 5 (1.8) | 91 (6.6) | 29 (11) | 6 (2.3) | 80 (3.8) | 131 (6.0) | |
| Not reported | 162 (39) | 309 (25) | 36 (24) | 60 (20) | 109 (40) | 311 (23) | 75 (27) | 58 (23) | 567 (27) | 553 (25) | |
| ETHNICITY (any race) N (%) | |||||||||||
| Hispanic | 45 (11) | 196 (16) | 30 (20) | 28 (9.5) | 23 (8.4) | 275 (20) | 55 (20) | 18 (7.0) | 299 (14) | 371 (17) | |
| Non-Hispanic | 227 (54) | 784 (64) | 91 (61) | 212 (72) | 143 (52) | 884 (64) | 178 (65) | 190 (74) | 1,314 (63) | 1,396 (64) | |
| Not reported | 149 (35) | 237 (20) | 28 (19) | 54 (18) | 107 (39) | 218 (16) | 43 (16) | 49 (19) | 468 (23) | 417 (19) | |
| WEIGHT N (%) | |||||||||||
| 110–149 lbs | 241 (57) | 701 (58) | 78 (53) | 124 (43) | 84 (31) | 385 (28) | 756 (28) | 11 (4.3) | 1,146 (55) | 556 (26) | |
| 150–174 lbs | 109 (26) | 290 (24) | 36 (24) | 83 (28) | 90 (33) | 420 (31) | 82 (30) | 46 (18) | 518 (25) | 638 (29) | |
| 175–199 lbs | 40 (9.5) | 137 (11) | 17 (11) | 46 (16) | 44 (16) | 319 (23) | 63 (23) | 63 (25) | 240 (12) | 488 (22) | |
| 200+ lbs | 30 (7.1) | 89 (7.3) | 18 (12) | 39 (13) | 55 (20) | 254 (18) | 56 (20) | 137 (53) | 176 (8.5) | 503 (23) | |
| Not reported | 1 (0.2) | 1 (0.0) | |||||||||
| PRIOR DONATION HISTORY AT ENROLLMENT | |||||||||||
| First-time donor, N (%) | 333 (79) |
838 (69) |
66 (44) |
128 (44) |
230 (84) |
1,011 (73) |
125 (45) |
100 (39) |
1,365 (66) |
1,466 (67) |
|
| Repeat donor, Donations last 12m† |
1.15 (0.36) |
1.24 (0.65) |
1.24 (0.86) |
1.45 (1.11) |
1.14 (0.41) |
1.37 (0.68) |
1.57 (1.04) |
1.68 (1.24) |
1.28 (0.79) |
1.46 (0.91) |
|
| Repeat donor, Donations last 24m† |
1.15 (0.36) |
1.50 (0.77) |
1.86 (1.04) |
2.70 (1.89) |
1.14 (0.41) |
1.52 (0.77) |
2.03 (1.25) |
3.10 (2.13) |
1.78 (1.25) |
1.95 (1.43) |
|
*
BCW = BloodCenter of Wisconsin; ARC-CT = American Red Cross, Connecticut Blood Services Region
†
mean (SD)