Fig. 4From: Cerebrospinal fluid cholinergic biomarkers are associated with postoperative delirium in elderly patients undergoing Total hip/knee replacement: a prospective cohort studyPatients with POD (Group P);Patients without POD (Group NP). Compared with NPOD, aP < 0.05,Compared with preoperative plasma(T0), bP < 0.05, with statistical significance. P-values were determined using the t-test. POD, postoperative delirium; CSF, cerebrospinal fluidBack to article page