Abstract:[Objective] To explore factors related to delirium after operation for hip fractures in the elderly. [Methods] A total of 308 elderly patients who underwent surgical treatment for hip fractures in our hospital from August 2015 to August 2019 were included in this study. The patients were divided into two groups based on whether delirium occurred postoperatively, and univariate comparison and binary multiple logistic regression were conducted to search the factors related the postoperative delirium. [Results] Among 308 patients, 62 pa- tients were diagnosed of delirium after operation, accounting for 20.13%. The onset time of delirium ranged from 1 to 7 days after operation, with an average time of (4.56±1.53) days. In term of univariate comparison, the delirium group proved significantly greater than the non-de- lirium group regarding to the age, type II diabetes incidence, ASA grade, general anesthesia ratio, intraoperative blood loss and operation time (P<0.05) . As results of multivariate logistic regression, the advanced age (OR=1.254, P<0.05) , type II diabetes (OR=4.602, P<0.05) , high ASA grade (OR=5.407, P<0.05) , general anesthesia (OR=4.766, P<0.05) and long operation time (OR=1.129, P<0.05) were of inde- pendent risk factors for postoperative delirium. [Conclusion] The risk factors of delirium after surgical treatment for hip fractures in the el- derly include advanced age, type II diabetes, high ASA grade, general anesthesia and long operation time.