Abstract: Objective To explore the incidence and risk factors of postoperative delirium(POD) in the elderly patients with different personalities undergoing laparoscopic hysterectomy. Methods A total of 168 elderly patients undergoing laparoscopic hysterectomy were enrolled in this study, and the related data such as age, hemoglobin level, CO₂ pneumoperitoneum time and pressure, blood loss, preoperative anxiety and postoperative pain control, and the dimension score of personality questionnaire were observed and recorded. All the patients were divided into POD group and non-POD group according to whether they presented with POD. Single factor and multiple factor binary Logistic regression analysis were used to analyze the relevant factors for POD in the patients. Results Among 168 elderly patients undergoing laparoscopic hysterectomy, 53 cases (31.55%) presented with POD. The incidence of POD in the patients with introverted personality (48.08%) was significantly higher than that in the patients with extroverted (18.37%) and intermediate (28.36%) personality (P<0.05). Multivariate Logistic regression analysis showed that age >70 years, preoperative anemia, CO₂ pneumoperitoneum time >90 min, poor postoperative pain control and internal and external dimension score <43.3 were the risk factors of POD, while neuroticism dimension score <43.3 was the protective factor of POD. Conclusions The elderly patients with laparoscopic hysterectomy have a high incidence of POD. The personalities show effects on the occurrence of POD.

Key words: personality, aged, laparoscopic hysterectomy, postoperative delirium