Overall | Normal cognition | MCI | AD | |||||
---|---|---|---|---|---|---|---|---|
African American (n = 65) | Caucasian (n = 70) | African American (n = 27) | Caucasian (n = 29) | African American (n = 27) | Caucasian (n = 25) | African American (n = 11) | Caucasian (n = 16) | |
Age, years (SD) | 69.1 (7.4) | 70.8 (7.7) | 67.5 (6.2) | 71.4 (8.1) | 67.7 (7.6) | 71.5 (5.8) | 71.4 (9.1) | 68.5 (9.4) |
Male sex, n (%) | 29 (45%) | 29 (41%) | 10 (37%) | 12 (41%) | 15 (56%) | 10 (40%) | 4 (36%) | 7 (44%) |
Education, years (SD) | 16.1 (2.8) | 16.4 (2.7) | 15.8 (2.7) | 17.0 (2.6) | 16.3 (2.9) | 17.1 (2.6) | 16.7 (3.4) | 14.2 (1.9) |
MMSE (SD) | 26.1 (4.0) | 26.7 (3.6) | 28.0 (1.8) | 28.9 (0.8) | 26.6 (2.4) | 27.6 (1.7) | 20.5 (5.9) | 21.4 (3.4) |
Hypertension | 47 (72%)a | 32 (46%) | 17 (63%) | 13 (45%) | 21 (78%) | 14 (56%) | 9 (82%) | 5 (31%) |
Diabetes | 22 (34%)a | 4 (6%) | 9 (33%) | 2 (7%) | 8 (30%) | 0 | 5 (45%) | 2 (12%) |
Average number of vascular risk factors (SD) | 1.9 (1.2)a | 1.3 (1.1) | 1.5 (1.1) | 1.3 (1.3) | 2.2 (1.3) | 1.4 (0.9) | 2.2 (1.2) | 1.0 (1.0) |
Having at least one APOE ε4 allele, n (%) | 31/60 (52%) | 35/70 (50%) | 7/25 (29%) | 11 (38%) | 15/26 (58%) | 13 (52%) | 9/10 (90%) | 11 (69%) |
Having ABCA7 risk allele, n (%) | 28/60 (47%)a | 16/70 (23%) | 12/25 (48%) | 8 (27%) | 13/25 (52%) | 6 (24%) | 3/10 (30%) | 2 (12%) |
Completed LP, n (%) | 58 (89%) | 68 (97%) | 23 (85%) | 28 (97%) | 25 (93%) | 25 (100%) | 10 (91%) | 15 (94%) |
CSF | ||||||||
Aβ42, pg/ml (SD) | 212.3 (118) | 207.2 (148) | 273 (110) | 250 (131) | 178 (110) | 226 (172) | 158 (105) | 96 (61) |
Aβ40, ng/ml (SD) | 7.89 (2.92) | 9.29 (3.32) | 7.21 (1.96)a | 10.03 (3.65) | 7.83 (3.21) | 9.38 (3.18) | 9.49 (3.61) | 7.91 (2.54) |
t-Tau, pg/ml (SD) | 47.0 (31.1)a | 71.5 (47.8) | 36.3 (12.0)a | 58.6 (29.0) | 46.4 (38.6) | 66.6 (38.4) | 72.8 (27.5) | 103.8 (72.9) |
p-Tau181, pg/ml (SD) | 17.9 (9.3)a | 25.6 (12.6) | 13.8 (5.1)a | 22.5 (9.8) | 18.8 (10.2) | 24.0 (12.0) | 25.3 (10.3) | 34.2 (14.9) |
CSF t-Tau/Aβ42 > 0.39 | 17/58 (29%) | 31/68 (46%) | 2/23 (9%) | 7/28 (25%) | 9/25 (36%) | 13/25 (52%) | 6/10 (60%) | 11/15 (73%) |
Log10(NfL), ng/ml (SD) | 2.87 (0.27) | 2.97 (0.19) | 2.76 (0.23) | 2.96 (0.22) | 2.87 (0.26) | 2.96 (0.15) | 3.14 (0.23) | 3.02 (0.22) |
Log10(WMH), cm3 (SD) | 0.367 (0.453) | 0.437 (0.364) | 0.238 (0.337) | 0.355 (0.365) | 0.401 (0.515) | 0.483 (0.308) | 0.607 (0.466) | 0.514 (0.431) |