Table 1.
Imaging modalities available at each time point (year). SPARE-CD uses time points 1 through 9; PiB analysis uses available data at later time points. N = number of subjects. CVLT scores were computed only from the imaging data used to train/test the classifier, that is, subjects and time points for which MRI or [15O] PET-CBF data were available
| Year | N | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MRI | 143 | 98% | 85% | 84% | 77% | 76% | 72% | 69% | 62% | 55% | — | — | — | — | — |
| PET | 137 | 98% | 87% | 83% | 77% | 77% | 67% | 66% | 61% | 55% | — | — | — | — | — |
| CVLT | 143 | 98% | 85% | 84% | 77% | 76% | 72% | 69% | 62% | 55% | — | — | — | — | — |
| PiB | 66 | — | 2% | 2% | — | — | 2% | — | 5% | 9% | 26% | 64% | 23% | 20% | 3% |