Pretest and posttest probabilities of HIT according to 4Ts score and PF4/H-PaGIA result
| 4Ts score . | n (%) . | Pretest probability % (95% CI) . | PF4/H-PaGIA* number . | Posttest probability . | ||
|---|---|---|---|---|---|---|
| Negative . | Positive . | PF4/H-PaGIA negative % (95% CI) . | PF4/H-PaGIA positive % (95% CI) . | |||
| Low | 321 (61) | 1.9 (0.8-4.1) | 280 (0 HIT) | 39 (6 HIT) | 0 (0-1.3) | 15.4 (5.9-30.5) |
| Intermediate | 164 (31) | 6.7 (3.6-11.7) | 137 (0 HIT) | 26 (11 HIT) | 0 (0-2.7) | 42.3 (23.4-63.1) |
| High | 41 (8) | 36.6 (23.5-51.9) | 24 (0 HIT) | 17 (15 HIT) | 0 (0-14.3) | 88.2 (63.6-98.5) |
| 4Ts score . | n (%) . | Pretest probability % (95% CI) . | PF4/H-PaGIA* number . | Posttest probability . | ||
|---|---|---|---|---|---|---|
| Negative . | Positive . | PF4/H-PaGIA negative % (95% CI) . | PF4/H-PaGIA positive % (95% CI) . | |||
| Low | 321 (61) | 1.9 (0.8-4.1) | 280 (0 HIT) | 39 (6 HIT) | 0 (0-1.3) | 15.4 (5.9-30.5) |
| Intermediate | 164 (31) | 6.7 (3.6-11.7) | 137 (0 HIT) | 26 (11 HIT) | 0 (0-2.7) | 42.3 (23.4-63.1) |
| High | 41 (8) | 36.6 (23.5-51.9) | 24 (0 HIT) | 17 (15 HIT) | 0 (0-14.3) | 88.2 (63.6-98.5) |
Two low and 1 intermediate participants with indeterminate PF4/H-PaGIA were omitted.