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Table 1: Demographic and medical history descriptive statistics for healthy controls, patients with amnestic MCI, and subjects with AD (N = 41)
NC (n = 15) n (%) aMCI (n = 12) n (%) AD (n = 14) n (%) χ²/F-test P Value
Demographics 
    Age (mean) (yr) 77.54 ± 4.01 79.05 ± 7.23 78.30 ± 9.55 0.15 .87
    Female 10 (66) 6 (50) 8 (57) 0.78 .68
    Education (mean ± SD) 16.14 ± 2.51 15.08 ± 3.66 15.14 ± 2.83 0.54 .59
    Right-handed 13 (87) 11 (92) 13 (93) 1.94 .75
    White race 14 (93) 10 (83) 12 (86) 4.46 .62
Medical history 
    Hypertension 8 (53) 8 (67) 4 (29) 3.95 .14
    Hypercholesterolemia 12 (80) 9 (75) 6 (43) 3.09 .21
    Diabetes 2 (13) 1 (8) 1 (7) 0.35 .84
    Thyroid disease 3 (20) 2 (17) 1 (7) 1.01 .60
    Cardiac arrest 2 (13) 3 (25) 1 (7) 2.01 .37
    Cardiac bypass 1 (7) 1 (8) 0 (0) 1.13 .57
    Stroke or TIA 1 (7) 1 (8) 1 (7) 0.03 .99
    Depression within the past 2 years 4 (27) 1 (8) 4 (29) 1.85 .40
Note:—TIA indicates transient ischemic attack.