TABLE 3.
Separation of Risk Strata by Different Models in Validation Dataset
| 5-y free-of-conversion rate |
Pairwise log-rank P |
|||||
| Parameter | Low | Medium | High | Medium vs. high | Low vs. medium | Low vs. high |
| Amyloid PET | 98% | 54% | 55% | 0.331 | 1 × 10−4 | 1 × 10−5 |
| 18F-FDG PET | 79% | 76% | 45% | 0.022 | 0.109 | 6 × 10−4 |
| Nonimaging | 95% | 54% | 40% | 1 × 10−4 | 0.032 | 7 × 10−8 |
| 18F-FDG PET + amyloid PET | 97% | 70% | 33% | 1 × 10−4 | 0.008 | 2 × 10−8 |
| Amyloid PET + nonimaging | 97% | 63% | 39% | 1 × 10−5 | 0.015 | 8 × 10−9 |
| 18F-FDG PET + nonimaging | 100% | 74% | 19% | 8 × 10−6 | 0.003 | 1 × 10−10 |
| Amyloid PET + 18F-FDG PET + nonimaging | 100% | 64% | 24% | 4 × 10−6 | 0.002 | 5 × 10−11 |