Table 3.
False positivity rates of the Elecsys® assay and the EDITM ELISAs (IgM and IgG) in 200 healthy blood donors and in 256 patients admitted to an intensive care unit (ICU).
| n (%) | Elecsys® assaya | EDITM IgMb | EDITM IgGb | EDITM IgM or IgGb | |
|---|---|---|---|---|---|
| n negative (%) | n negative (%) | n negative (%) | n negative (%) | ||
| n positive (%) | n positive (%) | n positive (%) | n positive (%) | ||
| Blood donors | 200 (100%) | 200 neg. (100%) | 199 neg. (99.5%) | 198 neg. (99%) | 197 neg. (98.5%) |
| 0 pos. (0%) | 1 pos. (0.5%) | 2 pos. (1%) | 3 pos. (1.5%) | ||
| ICU patients | 256 (100%) | 255 neg. (99.6%) | 252 neg. (98.4%) | 253 neg. (98.8%) | 249 neg. (97.3%) |
| 1 pos. (0.4%) | 4 pos. (1.6%) | 3 pos. (1.2%) | 7 pos. (2.7%) |
aElecsys® assay: negative (COI < 1.0); positive (COI ≥ 1.0).
bEDITM ELISAs (IgM and IgG): negative (OD < positive cutoff); positive (OD ≥ positive cutoff).