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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 1. Baseline sample characteristics of Aβ-stable versus Aβ-converters.

Descriptive statistics of Aβ-stable and Aβ-converter participants 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.

 Measures (units) Aβ-stable Aβ-converter
n 252 40
Age (years) 71.62 (7.20) 71.69 (6.71)
Gender (male) 128 (50.8%) 25 (62.5%)
APOE-ε4 status (ε4+) 41 (16.3%) 12 (30.0%)
MCI Diagnosis (MCI) 117 (46.4%) 21 (52.5%)
Education* (years) 16.21 (2.56) 17.20 (2.22)
Length of follow-up (years)* 3.22 (1.59) 4.30 (2.44)
ADNI_MEM 0.89 (0.68) 0.70 (0.59)
PACC −1.32 (3.31) −1.97 (3.03)