IGF1 and posterior cortical atrophy: PCa exhibited significant associations with insulin-like growth factor 1 (IGF-1; r = 1.119051258, P = .004101067), Lipoprotein A (LPA; r = 1.120348291, P = .038093372), TP (r = 0.87643517, P = .01657563), and non-albumin protein (NAP; r = 0.905333153, P = .03103913).