Table 2. Comparison of the Alzheimer’s Disease Neuroimaging Initiative (ADNI) and Mayo Clinic Study of Aging (MCSA) Baseline and Annual Change Values in Entorhinal Cortex (ERC) and Inferior Temporal (IT) Regions of Interest.
| Outcome | Mean (SD) | |||
|---|---|---|---|---|
| <8 CL | 9-21 CL | 22-67 CL | >68 CL | |
| Participants, No. (%) | ||||
| ADNI | 32 (28) | 18 (16) | 36(32) | 28 (25) |
| MCSA | 24 (14) | 70 (42) | 42 (25) | 31 (19) |
| Baseline flortaucipir SUVR | ||||
| ERC | ||||
| ADNI | 1.101 (0.088) | 1.167 (0.108) | 1.167 (0.112) | 1.261 (0.180) |
| MCSA | 1.068 (0.115) | 1.088 (0.096) | 1.112 (0.092) | 1.346 (0.263) |
| IT | ||||
| ADNI | 1.184 (0.078) | 1.222 (0.096) | 1.251 (0.155) | 1.323 (0.181) |
| MCSA | 1.193 (0.094) | 1.228 (0.078) | 1.246 (0.078) | 1.335 (0.172) |
| Annual change in flortaucipir SUVR | ||||
| ERC | ||||
| ADNI | 0.015 (0.057) | –0.011 (0.076) | 0.008 (0.037) | 0.014 (0.045) |
| MCSA | –0.001 (0.029) | 0.007 (0.019) | 0.007 (0.021) | 0.032 (0.039) |
| IT | ||||
| ADNI | 0.019 (0.057) | –0.021 (0.069) | 0.013 (0.029) | 0.030 (0.051) |
| MCSA | –0.004 (0.022) | 0.004 (0.016) | 0.005 (0.022) | 0.030 (0.033) |
Abbreviation: CL, centiloid; SUVR, standardized uptake value ratio.