Table 4.
Sensitivity and specificity associated with hemorrhage risk assessment tool for prediction of transfusion and EBL ≥1,000 mL
| High vs. Low | Medium vs. Low | High and Medium vs. Low | |
|---|---|---|---|
| Predicting any transfusion | |||
| Sensitivity | 0.84 | 0.82 | 0.91 |
| Specificity | 0.48 | 0.36 | 0.26 |
| PPV | 0.01 | 0.00 | 0.01 |
| NPV | 1.00 | 1.00 | 1.00 |
| Prediction accuracy | 0.49 | 0.36 | 0.26 |
| Predicting EBL ≥1,000 mL | |||
| Sensitivity | 0.85 | 0.86 | 0.92 |
| Specificity | 0.50 | 0.37 | 0.27 |
| PPV | 0.10 | 0.07 | 0.08 |
| NPV | 0.98 | 0.98 | 0.98 |
| Prediction accuracy | 0.53 | 0.40 | 0.32 |
Abbreviations: EBL, estimated blood loss; NPV, negative predictive value; PPV, positive predictive value.