TABLE 4.
Cross-validation performance of the APPRAISE-HRI algorithm, using the first reliable set of inputs for each of the 663 patients in the testing set (79 with hemorrhage; for a 12% prevalence rate)
| HRI level | Hemorrhage, n | Control, n | Total, n | Hemorrhage risk | Likelihood ratio |
|---|---|---|---|---|---|
| I | 8 (2) | 197 (17) | 205 (17) | 0.04 (0.01) | 0.29 (0.08) |
| II | 49 (5) | 355 (14) | 404 (14) | 0.12 (0.01) | 1.03 (0.12) |
| III | 22 (5) | 32 (9) | 54 (14) | 0.41 (0.05) | 5.26 (1.04) |
| Total | 79 | 584 | 663 |
Entries indicate mean value (one SD) over 100 random realizations using 60% of the study population to train and 40% to independently test the algorithm.
HRI, hemorrhage risk index.