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Sample sizes, across racial groups, over time
| Baseline | Year 1 | Year 2 | |
|---|---|---|---|
| White | 2392 | 2120 | 1898 |
| African Americana | 652 | 479 | 426 |
| Total | 1520 | 1303 | 1151 |
African American participants in Religious Orders Study (ROS) and Rush Memory and Aging Project (MAP) were combined with those in the MARS cohort; ROS and MAP Whites were combined for the other group.
