First of all, binary logistics regression displayed that GNRI score (adjusted OR 0.94, 95% CI 0.88–0.99, p = 0.018), hip circumference (adjusted OR 0.80, 95% CI 0.69–0.93, p = 0.004) and the levels of total protein (adjusted OR 0.80, 95% CI 0.73–0.89, p = 0.001), albumin (adjusted OR 0.70, 95% CI 0.62–0.85, p < 0.001), globulin (adjusted OR 0.75, 95% CI 0.64–0.89, p = 0.001), and apolipoprotein A1 (adjusted OR 0.08, 95% CI 0.01–0.55, p = 0.001) were negatively associated with AD-MCI (Figure 3). This evidence concerns the gene ALB and Alzheimer disease.