RBP4 and Stroke: Similarly, increased serum RBP4 (p = 0.005), Th17 cells (p = 0.004), and Th17/Treg ratio (p = 0.024) were associated with cognitive impairment at enrollment, whereas Treg cells (p = 0.958) were not associated with cognitive impairment at enrollment in stroke patients (Figures 4A–D).