Separation of Risk Strata by Different Models
| Hazard ratio | Median time to conversion (mo) | Pairwise log-rank P value | |||||||
| Parameter | Low risk | Medium risk | High risk | Low risk | Medium risk | High risk | Low vs. medium | Medium vs. high | Low vs. high |
| PES values alone | 1 | 4.62 | 9.70 | 120 | 68 | 36 | 1.2 × 10−5 | 0.0007 | 3.0 × 10−13 |
| PI derived from combined model (including PES values) | 1 | 4.75 | 15.92 | 120 | 96 | 32 | 8.3 × 10−8 | 1.2 × 10−5 | 2.0 × 10−16 |