Trends in Recent Blood Donations across the United States Adult Population, 1999 to 2016
| Category | Unweighted N*† | Weighted % (SE)† | 1999 to 2004 | 2005 to 2010 | 2011 to 2016 | P Value‡ |
|---|---|---|---|---|---|---|
| Donated last 12 months | ||||||
| No | 37,778 | 94.1 (0.2) | ||||
| Yes | 1,674 | 5.9 (0.2) | 6.2 (5.6–6.8) | 6.2 (5.4–6.9) | 5.5 (5.9–6.2) | 0.29 |
| Sex | ||||||
| Male | 19,268 | 48.6 (0.2) | 6.4 (5.6–7.2) | 6.7 (5.8–7.6) | 6.0 (5.1–6.8) | 0.50 |
| Female | 20,184 | 51.4 (0.2) | 5.9 (5.1–6.8) | 5.7 (4.9–6.5) | 5.1 (4.3–6.0) | 0.39 |
| Age | ||||||
| 20 to 29 years | 6,954 | 19.0 (0.4) | 5.9 (4.6–7.2) | 6.5 (5.2–7.9) | 8.4 (7.1–9.7) | 0.02 |
| 30 to 39 years | 6,629 | 18.7 (0.3) | 7.0 (5.5–8.5) | 6.0 (4.8–7.2) | 4.2 (3.3–5.2) | 0.0057 |
| 40 to 49 years | 6,658 | 20.3 (0.3) | 7.8 (6.3–9.3) | 7.1 (5.6–8.7) | 5.6 (3.9–7.3) | 0.14 |
| 50 to 59 years | 5,815 | 18.0 (0.3) | 6.9 (5.6–8.3) | 7.7 (5.9–9.5) | 7.0 (5.3–8.6) | 0.76 |
| 60 years | 13,396 | 24.0 (0.4) | 3.3 (2.5–4.1) | 4.9 (3.0–4.9) | 3.4 (2.5–4.2) | 0.58 |
| Race/ethnicity | ||||||
| Non-Hispanic white | 18,672 | 70.6 (1.1) | 7.0 (6.3–7.8) | 7.2 (6.3–8.2) | 6.5 (5.6–7.4) | 0.46 |
| Non-Hispanic black | 7,982 | 10.7 (0.6) | 3.8 (2.8–4.8) | 3.1 (2.4–3.8) | 3.8 (2.9–4.7) | 0.40 |
| Mex-American or Hispanic | 9,863 | 12.7 (0.8) | 3.4 (2.1–4.7) | 3.3 (2.6–4.1) | 3.3 (2.5–4.1) | 0.99 |
| Other | 2,935 | 6.0 (0.3) | 5.8 (2.7–9.0) | 4.6 (2.5–6.6) | 3.8 (2.5–5.0) | 0.44 |
| Household income | ||||||
| ≤130% | 12,100 | 21.1 (0.6) | 2.6 (1.8–3.4) | 2.9 (2.2–3.6) | 2.9 (2.2–3.7) | 0.79 |
| 130% to ≤ 185% | 5,356 | 10.9 (0.3) | 3.5 (2.3–4.7) | 3.2 (2.2–4.3) | 4.0 (2.5–5.5) | 0.70 |
| >185% | 21,996 | 68.0 (0.8) | 7.7 (6.8–8.6) | 7.5 (6.7–8.4) | 6.7 (5.7–7.6) | 0.25 |
| Education | ||||||
| High school or less | 19,685 | 40.6 (0.8) | 3.5 (2.8–4.2) | 3.6 (2.8–4.3) | 2.8 (2.1–3.6) | 0.31 |
| College/AA | 11,165 | 31.3 (0.4) | 6.5 (5.5–7.5) | 6.9 (5.6–8.3) | 6.5 (5.4–7.6) | 0.84 |
| College graduate | 8,602 | 28.1 (0.8) | 10.7 (8.8–12.6) | 9.4 (8.0–10.9) | 7.5 (6.2–8.8) | 0.0165 |
SE, standard error; AA, associate of arts.
↵* The sample sizes were unweighted, but the percentages were generated as weighted estimates.
↵† Unweighted N and weighted % represent the breakdown of the entire study population. Subsequent columns represent the percentage of people who donated blood during the indicated time period.
↵‡ Wald χ2 tests were used to determine changes in the prevalence of recent blood donations for each subgroup. The values in bold are significant.