Table 1.
ED 6 month revisit risk stratification results
| Characteristics | Retrospective | Prospective | ||||
|---|---|---|---|---|---|---|
| (Jan. 1, 2012 – Dec. 31, 2012) | (Jan. 1, 2013 – Jun. 30, 2013) | |||||
| Risk score threshold | Risk score threshold | |||||
| 50 | 70 | 80 | 50 | 70 | 80 | |
| No. of ED encounters | 95,785 | 75,593 | 49,109 | 62,189 | 47,235 | 28,166 |
| Positive predictive value | 0.614 | 0.696 | 0.83 | 0.597 | 0.669 | 0.794 |
| Sensitivity | 0.758 | 0.598 | 0.389 | 0.716 | 0.544 | 0.324 |
| Specificity | 0.639 | 0.802 | 0.94 | 0.608 | 0.781 | 0.931 |
| Average ED visits in the future 6 months | 2.13 | 2.74 | 4.11 | 2.32 | 3.01 | 4.77 |