Values are presented as mean (SD). All statistical tests were performed in R 3.5.1 with a significance level set at α = 0.05. Findings with p < 0.1 but > 0.05 were reported as borderline significant. Comparisons of subject characteristics between non-demented (GDS 1–3, n = 23) and demented subjects (GDS 4–7, n = 24) were performed using Student's two-sample t-test and Fisher's exact test for continuous and categorical variables, respectively.