Table 2.
Anti–SARS-CoV-2 Serology Results for All Participants
| All | PCR Positive | Suspected | P Value | |
|---|---|---|---|---|
| IgG positive (%) | 89/128 (69.5) | 66/77 (85.7) | 23/51 (45.1) | < .0001a |
| IgM positive (%) | 48/128 (37.5) | 35/77 (45.5) | 13/51 (25.5) | .0224a |
| IgG RFU median (IQR) | 144 (37.5- 448) | 184 (89-599) | 35 (7-238.5) | < .0001b |
| Minimum-maximum | 5- 2,520 | 10-1,764 | 5-2,520 | |
| IgM RFU median (IQR) | 38 (25.5- 71.25) | 42 (28-84) | 29.5 (18-50.5) | .0024b |
| Minimum-maximum | 14-2,334 | 14-2,334 | 14-189 |
IQR, interquartile range; PCR, polymerase chain reaction; RFU, relative fluorescence units; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.
aBy χ 2 test for PCR positive vs suspected SARS-CoV-2 infection.
bBy Mann-Whitney test for PCR positive vs suspected SARS-CoV-2 infection.