From: Tau levels are higher in objective subtle cognitive decline but not subjective memory complaint
Total sample | SMC− | SMC+ | F or χ2 | p | Obj-SCD− | Obj-SCD+ | F or χ2 | p | |
---|---|---|---|---|---|---|---|---|---|
N | 236 | 77 | 159 | 173 | 63 | ||||
Age, mean (SD) | 70.82 (6.24) | 70.00 (5.59) | 71.21 (6.52) | F = 1.96 | 0.162 | 70.80 (6.45) | 70.88 (5.70) | F = 0.09 | 0.926 |
Education, mean (SD) | 16.86 (2.21) | 17.09 (2.10) | 16.74 (2.25) | F = 1.30 | 0.256 | 16.81 (2.15) | 16.98 (2.37) | F = 0.29 | 0.591 |
Female/woman, % | 57.2% | 59.7% | 56.0% | χ2= 0.30 | 0.584 | 59.5% | 50.8% | χ2= 1.44 | 0.230 |
Race, % | χ2 = 6.32 | 0.176 | χ2= 2.75 | 0.600 | |||||
American Indian/Alaska Native | 0.4% | 1.3% | 0.0% | 0.6% | 0.0% | ||||
Asian | 1.7% | 1.3% | 1.9% | 1.2% | 3.2% | ||||
Black | 3.0% | 1.3% | 3.8% | 2.3% | 4.8% | ||||
White | 92.4% | 96.1% | 90.6% | 93.1% | 90.5% | ||||
More than one | 2.5% | 0.0% | 3.8% | 2.9% | 1.6% | ||||
Ethnicity, % | χ2 = 2.98 | 0.225 | χ2= 2.24 | 0.326 | |||||
Hispanic/Latino | 2.1% | 0.0% | 3.1% | 2.9% | 0.0% | ||||
Non-Hispanic/non-Latino | 97.5% | 100% | 96.2% | 96.5% | 100% | ||||
Unknown | 0.4% | 0.0% | 0.6% | 0.6% | 0.0% | ||||
Pulse pressure, mean (SD) | 55.40 (15.76) | 57.09 (15.06) | 54.58 (16.07) | F = 1.31 | 0.253 | 55.43 (15.20) | 55.33 (17.35) | F = .002 | 0.968 |
APOE ε4 carrier, % | 36.0% | 29.9% | 39.0% | χ2 = 1.87 | 0.171 | 37.0% | 33.3% | χ2 = 0.27 | 0.604 |
GDS, mean (SD) | 0.76 (1.11) | 0.40 (0.67) | 0.93 (1.24) | F = 12.24 | < 0.001 | 0.71 (1.05) | 0.89 (1.27) | F = 1.18 | 0.278 |
CCI, mean (SD) | 19.65 (7.14) | 13.56 (1.23) | 22.60 (6.94) | F = 128.39 | < 0.001 | 19.12 (6.63) | 21.11 (8.24) | F = 3.65 | 0.057 |
PACC, mean (SD) | 0.17 (2.82) | 0.85 (2.69) | − 0.15 (2.83) | F = 6.67 | 0.010 | 0.75 (2.36) | − 1.40 (3.35) | F = 30.20 | < 0.001 |
Tau PET, mean (SD) | 1.43 (0.15) | 1.44 (0.18) | 1.43 (0.13) | F = 0.17 | 0.681 | 1.42 (0.13) | 1.47 (0.19) | F = 4.03 | 0.046 |
Aβ PETa, mean (SD) | 21.93 (30.46) | 19.20 (28.26) | 23.26 (31.49) | F = 0.92 | 0.340 | 21.69 (30.06) | 22.58 (31.81) | F = 0.30 | 0.585 |
Aβ PET positivity, % | 34.5% | 29.9% | 36.7% | F = 1.07 | 0.301 | 34.1% | 35.5% | χ2= 0.04 | 0.844 |