Furthermore, a multivariate logistic regression analysis adjusting these five variables and general risk factors for AD (i.e., age and sex) showed that plasma levels of CTRP3 (OR = 1.119, 95% CI: 1.082–1.158, p < 0.001), CTRP4 (OR = 1.230, 95% CI: 1.133–1.335, p < 0.001), and CTRP14 (OR = 1.158, 95% CI: 1.055–1.271, p = 0.002) were associated with the presence of AD (Table 2). This evidence concerns the gene C1QTNF4 and Alzheimer disease.