Abstract: OBJECTIVE To explore the risk factors for postoperative incision infections in patients with closed pelvic fracture so as to provide guidance for clinical prevention and control of the postoperative incision infections.METHODS Totally 50 closed pelvic fracture patients with postoperative incision infections who were treated in orthopedics department of the Second Hospital of Ningbo from Jan 2006 to Dec 2015 were chosen as the infection group, meanwhile, 50 closed pelvic fracture patients who did not have postoperative incision infections were set as the control group.The clinical data of the two groups of patients were observed and compared, and the univariate analysis and multivariate logistic regression analysis were performed to analyze the risk factors for the postoperative incision infections in the patients with closed pelvic fracture.RESULTS The incidence of complication with abdominal injury, complication with Morel-lavellee injury, or complication with acetabular fracture was significantly higher in the infection group than in the control group (P＜0.05).There was no significant difference in the causes of injury, complication with cerebral trauma, complication with chest injury, complication with urinary tract injury, or complication with diabetes mellitus between the infection group and the control group.The body mass index, ISS score, intraoperative blood loss volume, and operation duration were higher in the infection group than in the control group (P＜0.05).The result of multivariate logistic regression analysis indicated that the complication with Morel-lavellee injury, complication with acetabular facture, body mass index, and operation duration were the independent risk factors for the postoperative incision infections in the patients with closed pelvic fracture (P＜0.05).CONCLUSIONThe postoperative incision infections in the patients with closed pelvic fracture is associated with the complication with abdominal injury, complication with Morel-lavellee injury, complication with acetabular facture, body mass index, ISS score, intraoperative blood loss volume, and operation duration.The independent influencing factors for the postoperative incision infection in the patients with closed pelvic fracture include the complication with Morel-lavellee injury, complication with acetabular fracture, body mass index, and operation duration.