Biological Pathways for Preoperative CSF Proteins in Delirium. Biological functional pathways determined using Ingenuity Pathway Analysis (IPA) that are significantly enriched in the 32 CSF delirium-associated proteins. Level of significance: p < 10−5. Migration and chemotaxis of immune cells includes these pathways: “Cell movement of monocytes”, “Cell movement of granulocytes”, “Cell movement of myeloid cells”, “Cell movement of phagocytes”, “Quantity of granulocytes”, “Migration of phagocytes”, “Chemotaxis of granulocytes”, “Chemotaxis of myeloid cells”, “Migration of myeloid cells”, and “Migration of monocytes”. Pathways enclosed by a red rectangle are presented in Supplementary Figure S1.