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目的:目前对新辅助化疗全胃切除术后近期并发症影响因素研究较少，开展本研究，旨在为临床上科学防范新辅助化疗全胃切除术后并发症的发生提供参考。方法:采用回顾性病例队列研究的方法。病例纳入标准：（1）术前胃镜病理、超声内镜、腹部CT或PET-CT证实为进展期胃癌（临床分期为Ⅱ~Ⅲ期）；（2）术前经多学科讨论评估适合行新辅助化疗；（3）术前无其他恶性肿瘤病史，未合并其他肿瘤；（4）新辅助化疗完成后行全胃切除+Dn 2淋巴结清扫术。排除标准：（1）年龄80岁；（2）基础疾病较多，存在心、肝、肾等重要脏器功能障碍，美国麻醉医师协会（ASA）分级>Ⅲ级；（3）残胃癌，既往行胃部手术者；（4）临床病理资料缺失。根据以上标准，共收集2012年6月至2019年6月期间，于解放军总医院第一医学中心普通外科行新辅助化疗后全胃切除术的140例患者临床病理资料，其中男性109例（77.9%），女性31例（22.1%），年龄（56.9±11.4）岁，体质指数（23.3±3.1）kg/mn 2。新辅助化疗方案分别为SOX（替吉奥+奥沙利铂）、XELOX（希罗达+奥沙利铂）、SP（顺铂+替吉奥）、FOLFOX6（奥沙利铂+亚叶酸钙+氟尿嘧啶）及口服单药替吉奥。采用logistic回归分析术后并发症发生与临床病理及新辅助化疗相关因素的关系，将单因素分析差异有统计学意义的因素纳入多因素分析。总体生存及无进展生存率采用Kaplan-Meier法并绘制生存曲线，组间差异比较采用log-rank检验。n 结果:全组有35例（25.0%）术后30 d内出现Clavien-Dindo分级≥Ⅱ级术后并发症，4例（2.9%）出现严重并发症（Clavien-Dindo分级≥Ⅲa级），分别为1例食管空肠吻合口漏，1例腔静脉血栓，1例胸腔积液；还有1例围手术期因感染性休克死亡。单因素分析结果显示，体质指数（n P=0.011）、新辅助化疗次数（n P=0.027）、肿瘤长径（n P=0.021）及术后病理有无血管侵犯（n P=0.033）与新辅助化疗全胃切除术患者发生术后30 d内并发症有关（均n Pgrade III; (3) stump gastric cancer or history of gastric surgery; (4) incomplete clinicopathological data. According to the above criteria, clinicopathological data of 140 advanced gastric cancer patients who underwent total gastrectomy after NACT in Chinese PLA General Hospital between June 2012 and June 2019 were collected, including 109 males and 31 females with mean age of (56.9±11.4) years and body mass indey (BMI) of (23.3±3.1) kg/m n 2. Logistic analysis was used to analyze the relationship between postoperative complication and clinicopathological data. Factors in univariate analysis with n P<0.05 were included in the multivariate analysis.n Results:Postoperative complications (Clavien-Dindo classification ≥ II) occurred in 35 cases (25.0%) and severe complications (Clavien-Dindo classification ≥ IIIa) occurred in 4 cases (2.9%), including 1 case of esophago-jejunal anastomotic leakage, 1 case of vena cava thrombosis, 1 case of pleural effusion, 1 case of septic shock during perioperative days resulting in death. Univariate analysis showed that BMI (n P=0.011), cycle of NACT (n P=0.027), tumor diameter (n P=0.021), and vascular invasion (n P=0.033) were associated with postoperative complication within 30 days, while open/laparoscopic total gastrectomy were not associated with postoperative complication (n P=0.926). Multivariate analysis revealed that BMI ≥ 25 kg/mn 2 (OR=3.294, 95% CI: 1.343-8.079, n P=0.009) and < 4 cycles of NACT (OR=2.922, 95% CI: 1.217-7.016, n P=0.016) were independent risk factors for postoperative complication. The 3-year overall survival rates of patients with or without complication were 54.4% and 64.0%, respectively (n P=0.395), and 3-year disease-free survival rates were 47.4% and 52.9%, respectively (n P=0.587).n Conclusions:Higher BMI and fewer cycles of NACT are independent risk factors of postoperative complication in advanced gastric cancer patients undergoing total gastrectomy after NACT. No obvious association is found between postoperative complication and surgical approaches.