RBP4 and Stroke: Serum RBP4 (p < 0.001), Th17 cells (p < 0.001), and the Th17/Treg ratio (p = 0.001) were negatively associated with MMSE score at enrollment, but Treg cells (p = 0.832) were not associated with MMSE score at enrollment in stroke patients (Figures 3A–D).