Table 3.
Characteristics Associated With Severe Acute Respiratory Syndrome Coronavirus 2 Seropositivity in Blood Donors From 6 US Metropolitan Regions, March–August 2020
| Characteristic | OR (95% CI) | P Value |
|---|---|---|
| Sex | ||
| Female | 1 (Reference) | .22 |
| Male | 0.93 (.82–1.05) | |
| Age, y | ||
| 16–29 | 1.31 (1.11–1.55) | <.001 |
| 30–49 | 1.12 (.97–1.30) | |
| 50–64a | 1 (Reference) | |
| ≥65 | 0.66 (.53–.83) | |
| Race/ethnicity | <.001 | |
| White | 1 (Reference) | |
| Black | 2.16 (1.64–2.85) | |
| Hispanic | 2.57 (2.17–3.05) | |
| Other | 1.16 (.96–1.41) | |
| Blood type | ||
| A | 1.11 (.97–1.26) | .29 |
| AB | 1.21 (.91–1.61) | |
| B | 1.00 (.82–1.21) | |
| O | 1 (Reference) | |
| Rh type | ||
| Rh negative | 1.03 (.88–1.22) | .69 |
| Rh positive | 1 (Reference) | |
| Donor type | ||
| First time | 2.24 (1.58–3.16) | <.001 |
| Repeat | 1 (Reference) |
Abbreviations: CI, confidence interval; OR, odds ratio; Rh, rhesus factor.
aThe 50–64-year age group had the highest frequency of donations.