Table 2. Demographics for Cohort Studies Included in the Analyses.
| Characteristic | WHICAP, No. (%) | ADSP, No. (%) | ROSMAP, No. (%) | EFIGA, No. (%) | ||
|---|---|---|---|---|---|---|
| White Participants | African American Participants | Hispanic Participants | ||||
| Total samples, No. | 845 | 1051 | 1699 | 10 339 | 1096 | 358 |
| Individuals with late-onset Alzheimer disease | 170 (20.1) | 372 (35.4) | 855 (50.3) | 5476 (52.9) | 455 (41.5) | 292 (81.5) |
| Women | 496 (58.7) | 740 (70.4) | 1215 (71.5) | 5972 (57.7) | 721 (65.8) | 192 (57.6) |
| Age, mean (SD), y | ||||||
| Total | 80.7 (7) | 80.1 (7) | 80.1 (7) | 81.0 (9) | 88.1 (6) | 76.9 (9) |
| Control participants | 79.5 (7) | 79.1 (7) | 79.5 (7) | 86.5 (4) | 87.0 (6) | 74.8 (8) |
| Affected individuals | 85.4 (7) | 82.1 (7) | 80.8 (6) | 76.1 (9) | 89.7 (6) | 77.2 (9) |
| Individuals with APOE ε4 allele | 189 (22.4) | 365 (34.7) | 412 (24.2) | 3055 (29.5) | 279 (25.5) | 96 (26.8) |
Abbreviations: ADSP, The Alzheimer Disease Sequencing Project; EFIGA, Estudio Familiar de Influencia Genetica en la Enfermedad de Alzheimer; ROSMAP, The Religious Orders Study and Memory and Aging Project; WHICAP, Washington Heights, Hamilton Heights, Inwood Community Aging Project.