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. Author manuscript; available in PMC: 2021 May 1.
Published in final edited form as: Biol Psychiatry. 2020 Jan 7;87(9):819–828. doi: 10.1016/j.biopsych.2019.12.021

Table 2. Baseline sample characteristics of cognitively normal versus mild cognitive impairment.

Descriptive statistics of cognitively normal participants versus those with mild cognitive impairment at baseline. Mean (SD) presented for continuous variables, count (%) presented for categorical variables. An asterisk indicates a significant (p < 0.05) difference between the two groups.

 Measure (units) Cognitively Normal MCI
n 154 138
Age (years) 72.67 (5.97) 70.47 (8.09)
Gender (male) 80 (51.9%) 73 (52.9%)
APOE-ε4 status (ε4+) 25 (16.2%) 28 (20.3%)
Education* (years) 16.50 (2.50) 16.18 (2.57)
Baseline CSF Aβ* (pg/ml) 1488.68 (233.40) 1443.50 (260.50)
Baseline CSF P-tau* (pg/ml) 19.47 (5.75) 19.54 (7.86)
ADNI_MEM* 0.59 (0.69) 0.46 (0.57)
PACC* −3.25 (3.15) −3.40 (2.42)