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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Neuropsychologia. 2019 Mar 28;129:83–92. doi: 10.1016/j.neuropsychologia.2019.03.015

Table 1. Demographic characteristics.

We present demographic characteristics of biomarker-negative cognitive normal (CN-) and biomarker-positive amnestic Mild Cognitive Impairment (aMCI+) groups, including the larger aMCI+ sample (n=338) inclusive of individuals who performed at floor levels, as well as the selected aMCI+ sample (n=235) of individuals who were able to perform the RAVLT adequately and who were the primary focus of the study.

CN- (N=158) aMCI+ (N=338) Selected aMCI+ (N=235)
Age 73.3 ± 5.9 73.4 ± 7.1 73.6 ± 7.3
Sex (Male/Female) 81/77 198/140 144/91
Education 16.6 ± 2.6 16.0 ± 2.8* 16.0 ± 2.8*
MMSE 29.0 ± 1.2 27.4 ± 1.9* 27.7 ± 1.9*
Global CDR All CDR 0 All CDR 0.5 All CDR 0.5
% APOE ε4 positive 16.4 65.1* 59.6*
*

indicates significant group differences between aMCI+ and CN- groups at p<0.05. MMSE = Mini Mental State Examination; ε4 = ε4 allele of the Apolipoprotein E (ApoE) gene. Means ± Standard Deviations are presented for continuous variables.