Table 2.
Blood donor characteristics
| Units, No (%) | Donors, No (%) | |
|---|---|---|
| All | 428,461 | 276,496 |
| Sex | ||
| Male | 243,083 (56.7) | 146,695 (53.1) |
| Female | 185,273 (43.2) | 129,683 (46.9) |
| Other | 105 (0.0) | 91 (0.0) |
| Donor age, years | ||
| <20 | 53,235 (12.4) | 44,989 (16.3) |
| 20 – 29 | 52,991 (12.4) | 39,842 (14.4) |
| 30 – 39 | 48,492 (11.3) | 33,349 (12.1) |
| 40 – 49 | 65,619 (15.3) | 41,645 (15.1) |
| 50 – 59 | 104,188 (24.3) | 60,212 (21.8) |
| 60 – 69 | 76,591 (17.9) | 41,648 (15.1) |
| 70+ | 27,154 (6.3) | 14,607 (5.3) |
| Body mass index at study entry | ||
| Underweight/normal (<18.5–24.9) | 96,264 (22.5) | 64,170 (23.2) |
| Overweight (25.0–29.9) | 122,855 (28.7) | 71,800 (26.0) |
| Obesity Moderate (30.0–34.9) | 63,488 (14.8) | 36,079 (13.1) |
| Obesity Severe/Morbid (≥35.0) | 34,099 (8.0) | 20,003 (7.2) |
| Missing | 111,755 (26.1) | 84,417 (30.5) |
| Blood group | ||
| A | 144,757 (33.8) | 97,819 (35.4) |
| B | 49,061 (11.5) | 32,594 (11.8) |
| AB | 13,076 (3.1) | 8,943 (3.2) |
| O | 221,562 (51.7) | 137,108 (49.6) |
| Rh(D) status | ||
| Rh(D) positive | 338,528 (79.0) | 224,477 (81.2) |
| Rh(D) negative | 89,928 (21.0) | 51,987 (18.8) |
| Donor hemoglobin level (g/dL) | ||
| 12.5–14 | 140,355 (32.8) | 93,818 (33.9) |
| 14–15 | 107,926 (25.2) | 69,251 (25.1) |
| 15–16 | 84,057 (19.6) | 53,798 (19.5) |
| 16–17 | 42,392 (9.9) | 27,627 (10.0) |
| 17+ | 15,882 (3.7) | 10,783 (3.9) |
| Missing | 37,849 (8.8) | 21,192 (7.7) |
| Tobacco use in the 30 days prior to donation | ||
| Yes | 26,358 (6.2) | 17,681 (6.4) |
| No | 271,673 (63.4) | 164,013 (59.3) |
| Unknown | 130,430 (30.4) | 94,775 (34.3) |