Comparison of the diagnostic tests
| . | PF4/heparin EIA (OD) . | PIPA . | PIFPA . |
|---|---|---|---|
| VITT | |||
| 1 | + (3.18) | + | + |
| 2 | + (3.40) | + | + |
| 3 | + (3.50) | + | + |
| 4 | + (3.0) | + | + |
| 5 | + (3.16) | + | + |
| 6 | + (2.02) | + | + |
| 7 | + (3.05) | + | + |
| 8 | + (3.18) | + | + |
| 9 | + (3.17) | + | + |
| 10 | + (3.18) | + | + |
| 11 | + (3.17) | + | + |
| 12 | + (3.20) | + | + |
| 13 | + (3.26) | + | + |
| 14 | + (3.78) | + | + |
| 15 | + (3.27) | + | + |
| 16 | + (2.82) | + | + |
| Vaccinated asymptomatic | |||
| 01 | + (0.52) | Negative | Negative |
| 02 | + (0.77) | Negative | Negative |
| 03 | + (0.89) | Negative | Negative |
| 04 | + (2.15) | Negative | Negative |
| 05 | + (0.85) | Negative | Negative |
| 06 | + (0.60) | Negative | Negative |
| 07 | + (0.73) | Negative | Negative |
| 08 | + (0.55) | Negative | Negative |
| 09 | + (0.67) | Negative | Negative |
| 10 | + (0.78) | Negative | Negative |
| 11 | Negative (0.15) | Negative | Negative |
| 12 | Negative (0.12) | Negative | Negative |
| 13 | Negative (0.10) | Negative | Negative |
| 14 | Negative (0.06) | Negative | Negative |
| 15 | Negative (0.16) | Negative | Negative |
| 16 | Negative (0.18) | Negative | Negative |
| 17 | Negative (0.21) | Negative | Negative |
| 18 | Negative (0.11) | Negative | Negative |
| 19 | Negative (0.11) | Negative | Negative |
| 20 | Negative (0.12) | Negative | Negative |
| . | PF4/heparin EIA (OD) . | PIPA . | PIFPA . |
|---|---|---|---|
| VITT | |||
| 1 | + (3.18) | + | + |
| 2 | + (3.40) | + | + |
| 3 | + (3.50) | + | + |
| 4 | + (3.0) | + | + |
| 5 | + (3.16) | + | + |
| 6 | + (2.02) | + | + |
| 7 | + (3.05) | + | + |
| 8 | + (3.18) | + | + |
| 9 | + (3.17) | + | + |
| 10 | + (3.18) | + | + |
| 11 | + (3.17) | + | + |
| 12 | + (3.20) | + | + |
| 13 | + (3.26) | + | + |
| 14 | + (3.78) | + | + |
| 15 | + (3.27) | + | + |
| 16 | + (2.82) | + | + |
| Vaccinated asymptomatic | |||
| 01 | + (0.52) | Negative | Negative |
| 02 | + (0.77) | Negative | Negative |
| 03 | + (0.89) | Negative | Negative |
| 04 | + (2.15) | Negative | Negative |
| 05 | + (0.85) | Negative | Negative |
| 06 | + (0.60) | Negative | Negative |
| 07 | + (0.73) | Negative | Negative |
| 08 | + (0.55) | Negative | Negative |
| 09 | + (0.67) | Negative | Negative |
| 10 | + (0.78) | Negative | Negative |
| 11 | Negative (0.15) | Negative | Negative |
| 12 | Negative (0.12) | Negative | Negative |
| 13 | Negative (0.10) | Negative | Negative |
| 14 | Negative (0.06) | Negative | Negative |
| 15 | Negative (0.16) | Negative | Negative |
| 16 | Negative (0.18) | Negative | Negative |
| 17 | Negative (0.21) | Negative | Negative |
| 18 | Negative (0.11) | Negative | Negative |
| 19 | Negative (0.11) | Negative | Negative |
| 20 | Negative (0.12) | Negative | Negative |
Results of the PF4/heparin EIA and the washed platelet PIPA test were compared with the flow cytometry–based PIFPA test. Results of the PF4/heparin EIAs are given in parentheses.
+ indicates that a test was rated positive; OD, optical density.