Table 3.
Probability of Normal VWF Repeat Testing Based on Initial VWF Value
| Previous VWF Antigen | Probability of normal (≥50%) VWF value on repeat testing |
|---|---|
| ≤20% | 0.0% |
| 30% | 3.6% |
| 40% | 20.5% |
| 50% | 47.5% |
| 60% | 70.8% |
| 70% | 85.1% |
| 80% | 92.6% |
| 90% | 96.6% |
| 100% | 98.0% |
| 110% | 99.1% |
| ≥120% | ≥99.4% |
VWF = von Willebrand Factor
Predicted probabilities produced from the multivariable model with the covariates set at the average age (14.4 years), 1st repeat lab after initial evaluation, and previous evaluation in the acute care setting.