Table 1.
Overview of sample characteristics of included cohorts.
| Sample | Lifebrain | UKB | ||||
|---|---|---|---|---|---|---|
| N participants | 1129 | 2198 | ||||
| N Females | 576 | 1136 | ||||
| N scans | 2606 | 4396 | ||||
| M | SD | Range | M | SD | Range | |
|---|---|---|---|---|---|---|
| Baseline age | 55.5 | 18.4 | 20.0–88.0 | 20.0 | 7.1 | 47.0–80.3 |
| Scan interval | 3.7 | 2.7 | 0.2–11.0 | 2.3 | 0.1 | 2.0–3.0 |
| Education | 14.9 | 3.1 | 2.0–20.0 | 14.0 | 2.3 | 10.0–16.0 |
| GCA | 0.0 | 1.0 | − 5.0–2.5 | 6.8 | 2.0 | 1.0–13.0 |
Age, education, and scans intervals (since baseline) are given in years. General Cognitive Ability (GCA) for Lifebrain is standardized per sample for first timepoint. GCA is given in z-scores for Lifebrain (see Supplementary Methods), and test-scores for UKB. M Mean, SD Standard Deviation.