TABLE 1.
Participant characteristics by cohort and ancestry.
| non‐Hispanic White (NHW) | non‐Hispanic Black (NHB) | |||||||
|---|---|---|---|---|---|---|---|---|
| Measure | ACT | ADNI | NACC | ROS/MAP/MARS | ACT | ADNI | NACC | ROS/MAP/MARS |
| Number of participants | 3585 | 1363 | 17,159 | 2109 | 102 | 50 | 2742 | 523 |
| Number of sessions | 18,337 | 7217 | 68,628 | 19,888 | 481 | 254 | 10,374 | 4022 |
| Number of visits | 6.79 (3.00) | 7.29 (3.30) | 6.37 (3.58) | 12.91 (5.77) | 6.29 (2.86) | 7.12 (3.13) | 6.22 (3.58) | 10.07 (4.23) |
| Follow‐up time (years) | 7.33 (4.94) | 3.06 (2.72) | 4.06 (2.92) | 6.87 (5.02) | 7.05 (4.76) | 3.21 (2.89) | 4.15 (2.98) | 5.80 (4.02) |
| Baseline age (years) | 74.34 (6.50) | 74.33 (6.61) | 73.97 (8.22) | 78.78 (7.43) | 73.39 (5.58) | 72.07 (5.80) | 73.27 (7.80) | 72.99 (6.40) |
| Education (years) | 15.02 (3.21) | 16.06 (2.78) | 15.93 (2.84) | 16.36 (3.53) | 13.38 (3.66) | 15.08 (3.26) | 14.33 (3.14) | 14.90 (3.53) |
| APOE ε4 (% positive) | 26.16 | 44.16 | 40.81 | 24.99 | 33 | 46 | 46.41 | 35.95 |
| Baseline diagnosis (% CU/MCI/AD) | 100/0/0 | 38.5/47.3/14.2 | 50.6/26.3/23.1 | 70.8/23.9/5.3 | 100/0/0 | 46.0/40.0/14.0 | 54.3/26.1/19.6 | 71.6/26.7/1.7 |
Note: Values denoted as mean (standard deviation) or frequency.
Abbreviations: ACT, Adult Changes in Thought; AD, Alzheimer's disease; ADNI, Alzheimer's Disease Neuroimaging Initiative; APOE, apolipoprotein E; CU, cognitively unimpaired; MAP, Memory and Aging Project; MARS, Minority Aging Research Study; MCI, mild cognitive impairment; NACC, national Alzheimer's coordinating center; ROS, religious orders study.