Table 1.
Demographic characteristics of study population.
| ≥1 APOE ε4 allele | No APOE ε4 allele | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Overall | White | Black | White | Black | |||||
| Male | Female | Male | Female | Male | Female | Male | Female | ||
| No (%) | 13,782 | 1,370 (9.9) | 1,458 (10.6) | 583 (4.2) | 870 (6.3) | 3,475 (25.2) | 3,834 (27.8) | 794 (5.8) | 1,398 (10.1) |
| Age at study entry, mean (SD) | 62.5 (1.5) | 62.6 (1.5) | 62.4 (1.5) | 62.6 (1.5) | 62.5 (1.4) | 62.5 (1.5) | 62.5 (1.4) | 62.7 (1.6) | 62.6 (1.5) |
| Education level, n (%) | |||||||||
| Less than HS | 3,307 (24.0) | 238 (17.4) | 221 (15.2) | 271 (46.5) | 365 (42.1) | 647 (18.7) | 663 (17.3) | 345 (43.7) | 557 (39.9) |
| HS and some college | 5,532 (40.2) | 526 (38.4) | 736 (50.5) | 135 (23.2) | 248 (28.6) | 1,342 (38.7) | 1,923 (50.2) | 206 (26.11) | 416 (29.8) |
| College and beyond | 4,921 (35.8) | 606 (44.2) | 501 (34.4) | 177 (30.4) | 255 (29.4) | 1,479 (42.7) | 1,244 (32.5) | 238 (30.2) | 421 (30.2) |
| Dementia diagnosis, n (%) | 2,612 (18.9) | 328 (23.9) | 404 (27.7) | 146 (25.0) | 260 (29.9) | 457 (13.2) | 589 (15.4) | 144 (18.1) | 284 (20.3) |
| Death prior to dementia, n (%) | 5,480 (39.76) | 610 (44.5) | 415 (28.5) | 296 (50.8) | 311 (35.8) | 1,629 (46.9) | 1,255 (32.7) | 425 (53.3) | 539 (38.6) |
| Length of follow-up, mean (SD) | 16.7 (7.3) | 16.9 (7.2) | 17.2 (7.0) | 14.8 (7.1) | 15.7 (7.1) | 16.9 (7.4) | 17.3 (7.4) | 14.8 (7.2) | 15.7 (7.3) |
| Age at dementia, mean (SD) | 80.3 (6.5) | 80.3 (6.3) | 80.4 (5.9) | 78.4 (6.3) | 78.9 (6.4) | 80.8 (6.8) | 82.1 (6.4) | 78.3 (6.3) | 79.2 (6.4) |
| Age at dementia-free death, mean (SD) | 74.8 (7.5) | 76.8 (7.7) | 78.5 (7.6) | 74.1 (7.5) | 75.3 (7.7) | 76.7 (7.8) | 77.6 (8.0) | 73.9 (7.5) | 75.0 (7.9) |