Parameter | Point(s) |
Thrombocytopenia |
- Platelet count 10,000 to 99,000/microL
| 2 |
- Platelet count <10,000/microL or 100,000 to 149,000/microL
| 1 |
- Platelet count ≥150,000/microL
| 0 |
Timing* |
- 5 to 14 days post vaccine
| 2 |
- 15 to 30 days post vaccine
| 1 |
- 0 to 4 days or ≥30 days post vaccine
| 0 |
Thrombosis |
- Definite thrombosis or D-dimer >10 mg/L (>10,000 ng/mL)
| 2 |
- Suspected (not documented) thrombosis or D-dimer 2.00 to 9.99 mg/L (2000 to 9990 ng/mL)
| 1 |
- No thrombosis and D-dimer <2 mg/L (<2000 ng/mL)
| 0 |
Other cause of thrombosis or thrombocytopenia |
| 2 |
| 1 |
| 0 |
Interpretation | Total |
- 0 to 3 points – Low probability
| |
- 4 to 5 points – Intermediate probability
| |
- 6 to 8 points – High probability
| |