ELISA OD | 4 Ts score | ||
Low (0 to 3 points)* Pretest probability <1% | Intermediate (4 to 5 points) Pretest probability approximately 10% | High (6 to 8 points) Pretest probability approximately 50% | |
<0.60¶ | HIT ruled out | HIT ruled out | HIT ruled out |
0.60 to 1.49 | HIT ruled outΔ | HIT uncertain◊, order functional assay | HIT uncertain◊, order functional assay |
1.50 to 1.99 | HIT uncertain◊, order functional assay | HIT uncertain◊, order functional assay | HIT very likely, continue treatment without further testing |
≥2.00 | HIT uncertain◊, order functional assay | HIT very likely, continue treatment without further testing | HIT very likely, continue treatment without further testing |
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