Fig. 3. Individual prevalence of cognitive decline on postoperative days (POD) 1, 2, and 3, and overall incidence of cognitive in the 3 days postoperatively in the open gastrectomy (OG) and laparoscopic gastrectomy (LG) groups. There was no significant difference between the groups in the individual prevalence of cognitive decline on POD 1, 2, or 3 (P = 0.982, P = 0.174, and P = 0.111, respectively). There was no significant difference between the groups in the overall incidence of cognitive decline during 3 days postoperatively (P = 0.744).