Objective:To elucidate the relationship between surgical time and postoperative complications in senile patients with hip fractures, and try to find out other factors which are related to these complications.Methods: Sixty-two patients, 28 males aged from 65 to 72 years with a mean age of 76.3 years and 34 females aged from 65 to 95 years with a mean age of 78.1 years, who had undergone orthopedic surgery because of hip fractures,were enrolled in a retrospective cohort study. The surgical time and patt, the type of fracture, preoperative comorbidities, American Society of Anesthesiologists (ASA) score and the volume of blood transfusion during operation were obtained from these patients who were followed up by telephone calls for postoperative complications.All the patients were followed up at least for 1 year and were divided into subgroups according to their clinical characteristics and the results were analyzed by the Statistical Analysis System software.Results:There was no significant difference in the morbidity of postoperative eomplications with the gender,age,surgical time and patt,or ASA score. There was significant difference in the morbidity of postoperative complications related to preoperative comorbidities and the volume of blood transfusion. There was a significant causality between preoperative comorbidities and postoperative complications. The morbidity of postoperative complications was 1.651 times higher in patients with preoperative comorbidities than those without.Conclusions:There is no relationship between the surgical time and postoperative complications in senile patients who received surgery for hip fracture within 1 year.No correlation is found between the postoperative complications and gender,age,type of fracture, surgical patt,ASA score and the volume of blood transfusion. Preoperative comorbidities are an independent predictor for postoperative complications.