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目的:探讨老年胃癌患者行胃切除术后发生医院感染的危险因素.方法:回顾性分析2012年7月～2014年7月间我院收治行胃切除术的老年胃癌患者,共123例,对其发生术后感染的危险因素进行分析.结果:共有24例患者发生医院感染,感染率19.5％.分析结果显示胃癌术后患者发生医院感染与BMI (体重指数)、吸烟、术前抗生素预防应用、术前输血、病理分期、住院时间有关 (均P＜0.05).结论:吸烟、术前抗生素预防应用、术前输血、病理分期和住院时间是老年胃癌术后发生医院感染的高危险因素.“,”OBJECTIVE: To explore the related risk factors of nosocomial infections after gastrectomy for gastric cancer in the eld-erly patients.METHOD: A total of 123 patients with gastric cancer who underwent gastrectomy from 2012 to 2014 were analyzed and analysis was preformed for the risk factors for the infections.RESULTS: The postoperative infection rate was 19.5％.There were sta-tistically significant difference in BMI,smoking history,preoperative prophylactic antibiotics,preoperative transfusion,pathologic stage and duration of hospitalization ( P＜0.05).CONCLUSION: The BMI,smoking history,preoperative prophylactic antibiotics,preoperative transfusion,pathologic stage and duration of hospitalization are the high risk factors of nosocomial infections in gastric cancer patients after gastrectomy.