Table 1.
Participant Demographics
| All Tested | Referred for Plasma Donation | Not Referred for Donationa | P Value (Referred vs Not Referred) | |
|---|---|---|---|---|
| Total | 128 | 89 | 39 | |
| Age, median (IQR), y | 40 (31-56) | 44 (32-57) | 34 (31-49) | NS |
| Minimum-maximum | 18-80 | 18-80 | 18-77 | — |
| Female sex, No. (%) | 68 (53.1) | 48 (53.9) | 20 (51.3) | NS |
| Days since last symptoms,b No. (IQR) | 38 (26-46) | 36 (24-42) | 46 (39-67.5) | < .0001 |
| Minimum-maximum | 5-103 | 7-75 | 9-103 | — |
| Mode of diagnosis, No. (%) | ||||
| PCR | 77 (60.2) | 66 (74.1) | 11 (28.2) | |
| Prior serology | 17 (13.3) | 7 (7.9) | 10 (25.6) | NA |
| Reported exposure | 34 (26.5) | 16 (18.0) | 18 (46.2) | |
| Severity, No. (%) | ||||
| Asymptomatic | 5 (4) | 2 (2.3) | 3 (7.7) | NA |
| Symptomatic, outpatient | 114 (89) | 78 (87.6) | 36 (92.3) | |
| Hospitalized | 9 (7) | 9 (10.1) | 0 (0) |
IQR, interquartile range; NA, not assessed; NS, not significant; PCR, polymerase chain reaction; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.
aParticipants were not referred for donation if anti-SARS-CoV-2 IgG was negative.
bFor the “all tested” group, the days since last symptoms was calculated by day of blood draw minus last day of symptoms, excluding asymptomatic individuals. For the “referred” and “not referred” groups, this calculation was by day of referral minus last day of symptoms. The P value is for comparison of the referred vs not referred groups.