Table 1.
Sample origins of the full sample
| Study | Observations | Participants | Age (mean) | Age (min–max) |
|---|---|---|---|---|
| HCP | 974 | 974 | 28.8 | 22–37 |
| BASE-II | 675 | 391 | 63.2 | 24–83 |
| Barcelona | 113 | 39 | 70.9 | 64–81 |
| Cam-CAN | 884 | 632 | 55.1 | 20–88 |
| LCBC | 1474 | 803 | 49.4 | 20–89 |
| UK Biobank | 45,983 | 43,137 | 64.5 | 45–83 |
| Betula | 423 | 284 | 62.3 | 25–85 |
| Whitehall-II | 769 | 769 | 69.8 | 60–85 |
| Total | 51,295 | 47,029 | 63.4 | 20–89 |
HCP: Human Connectome Project; BASE-II: Berlin Aging Study II; Barcelona: University of Barcelona brain studies; Cam-CAN: The Cambridge Center for Ageing and Neuroscience; LCBC: Center for Lifespan Changes in Brain and Cognition, University of Oslo.