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目的:探讨发生同时性结直肠癌肝转移（synCRLM）的影响因素。方法:采用回顾性病例对照研究方法。收集2010年1月至2016年1月青岛大学附属医院收治的3 172例原发性结直肠癌病人的临床病理资料；男1 946例，女1 226例；年龄为（63±12）岁，年龄范围为21～97岁。观察指标：（1）一般资料分析。（2）临床病理资料分析。（3）synCRLM影响因素分析。正态分布的计量资料以n x±s表示。计数资料以绝对数表示。剔除肿瘤分化程度、肿瘤长径、病理学T分期、病理学N分期缺失数据后进行synCRLM影响因素分析。单因素分析采用n χn 2检验或Logistic回归模型，多因素分析采用Logistic回归模型。n 结果:（1）一般资料分析：3 172例病人中，≤29岁、30～39岁、40～49岁、50～59岁、60～69岁、70～79岁、≥80岁分别为15例、82例、342例、774例、965例、759例、235例。青岛市病人2 972例，烟台市病人172例，威海市病人28例；2 972例青岛市病人中，市南区422例、市北区658例、黄岛区457例、崂山区144例、李沧区188例、城阳区205例、即墨区252例、胶州市221例、平度市255例、莱西市170例。（2）临床病理资料分析：3 172例病人中，结肠癌1 639例（左半结肠癌972例、右半结肠癌667例），直肠癌1 533例；腺癌2 981例，黏液腺癌165例，印戒细胞癌10例，其他类型（类癌、鳞癌、管状腺癌等）16例；高分化腺癌162例，高中分化腺癌5例，中分化腺癌2 338例，中低分化腺癌80例，低分化腺癌396例，缺失191例；肿瘤长径<4 cm 708例，≥4 cm 1 957例，缺失507例；病理学T分期T1～T2期486例，T3～T4期2 169例，缺失517例；病理学N分期N0期1 563例，N1～N2期1 062例，缺失547例；synCRLM阴性2 895例，阳性277例；无糖尿病2 799例，合并糖尿病373例；无脂肪肝2 931例，合并脂肪肝241例；乙型肝炎表面抗原（HBsAg）阴性2 989例，阳性183例。（3）synCRLM影响因素分析。单因素分析结果显示：性别、肿瘤部位、肿瘤分化程度、肿瘤长径、病理学T分期、脂肪肝、HBsAg是影响原发性结直肠癌发生synCRLM的相关因素（n χ2=7.400、7.577、7.111、4.513、12.125、5.686、5.919，n P<0.05）；中性粒细胞、淋巴细胞、血小板、丙氨酸氨基转移酶（ALT）、天冬氨酸氨基转移酶（AST）、总胆红素、γ-谷氨酰转移酶（GGT）、甘油三酯（TG）、总胆固醇（TC）、癌胚抗原（CEA）、CA19-9是影响原发性结直肠癌发生synCRLM的相关因素（优势比=1.101、0.807、1.002、1.017、1.023、1.027、1.012、0.686、1.169、1.007、1.004，95%可信区间为：1.048～1.156、0.678～0.960、1.001～1.004、1.011～1.024、1.016～1.031、1.011～1.044、1.009～1.015、0.541～0.869、1.047～1.306、1.006～1.008、1.003～1.004，n P<0.05）。多因素分析结果显示：男性、HBsAg阳性、AST、GGT、TC、CEA、CA19-9是影响原发性结直肠癌发生synCRLM的独立危险因素（优势比=1.503、2.492、1.018、1.007、1.301、1.005、1.003，95%可信区间为：1.038～2.178、1.443～4.304、1.003～1.034、1.003～1.011、1.112～1.522、1.003～1.006、1.002～1.003，n P<0.05）；淋巴细胞、ALT、TG是影响原发性结直肠癌发生synCRLM的独立保护因素（优势比=0.777、0.983、0.602，95%可信区间为：0.608～0.993、0.966～0.999、0.421～0.862，n P<0.05）。n 结论:男性、HBsAg阳性、AST、GGT、TC、CEA、CA19-9是影响原发性结直肠癌发生synCRLM的独立危险因素，淋巴细胞、ALT、TG是影响原发性结直肠癌发生synCRLM的独立保护因素。“,”Objective:To investigate the influencing factors for synchronous colorectal liver metastasis (synCRLM).Methods:The retrospective case-control study was conducted. The clinicopathological data of 3 172 patients with primary colorectal cancer (CRC) who were admitted to the Affiliated Hospital of Qingdao University from January 2010 to January 2016 were collected. There were 1 946 males and 1 226 females, aged (63±12)years, with a range from 21 to 97 years. Observation indicators: (1) general data analysis; (2) clinicopathological data analysis; (3) analysis of influencing factors for synCRLM. Measurement data with normal distribution were represented as n Mean±SD. Count data were represented as absolute numbers. The influencing factors for synCRLM were analyzed after excluding missing data of tumor differentiation degree, tumor diameter, pathological T stage and N stage. Univariate analysis was conducted by chi-square test or Logistic regression model. Multivariate analysis was conducted by Logistic regression model.n Results:(1) General data analysis: among the 3 172 patients, cases with age ≤29 years, from 30 to 39 years, from 40 to 49 years, from 50 to 59 years, from 60 to 69 years, from 70 to 79 years, and ≥80 years were 15, 82, 342, 774, 965, 759 and 235, respectively. There were 2 972 patients in Qingdao, 172 cases in Yantai and 28 cases in Weihai. Of the 2 972 patients in Qingdao, there were 422 cases in Shinan District, 658 cases in Shibei District, 457 cases in Huangdao District, 144 cases in Laoshan District, 188 cases in Licang District, 205 cases in Chengyang District, 252 cases in Jimo District, 221 cases in Jiaozhou City, 255 cases in Pingdu City, 170 cases in Laixi City. (2) Clinico-pathological data analysis: among the 3 172 patients, there were 1 639 cases of colon cancer including 972 cases with left colon cancer and 667 cases with right colon cancer, 1 533 cases of rectal cancer. There were 2 981 cases of adenocarcinoma, 165 cases of mucinous adenocarcinoma, 10 cases of signet ring cell carcinoma and 16 cases of other types including carcinoid tumor, squamous carcinoma, tubular adenocarcinoma, n etc.There were 162 cases with highly differentiated adenocarcinoma, 5 cases with highly-moderately differentiated adenocarcinoma, 2 338 cases with moderately differentiated adenocarcinoma, 80 cases with moderately-poorly differentiated adeno-carcinoma, 396 cases with poorly differentiated adenocarcinoma and 191 cases missing tumor differentiation data. There were 708 cases with tumor diameter <4 cm, 1 957 cases with tumor diameter ≥4 cm and 507 cases missing tumor diameter data. There were 486 cases in T1 or T2 stage of pathological T stage, 2 169 cases in T3 or T4 stage of pathological T stage and 517 cases missing tumor pathological T staging data. There were 1 563 cases in N0 stage of pathological N staging, 1 062 cases in N1 or N2 stage of pathological N staging and 547 cases missing tumor pathological N staging data. There were 2 895 cases without synCRLM and 277 cases with synCRLM. There were 2 799 cases without diabetes and 373 cases with diabetes. There were 2 931 cases without fatty liver and 241 cases with fatty liver. There were 2 989 cases negative for hepatitis B surface antigen (HBsAg) and 183 cases positive for HBsAg. (3) Analysis of influencing factors for synCRLM. Results of univariate analysis showed that gender, tumor location, tumor differentiation degree, tumor diameter, pathological T stage, fatty liver, HBsAg were related factors for synCRLM in primary colorectal cancer ( n χ2=7.400, 7.577, 7.111, 4.513, 12.125, 5.686, 5.919,n P<0.05), and neutrophils counts, lymphocytes counts, platelet counts, alanine aminotransferase (ALT), aspartate aminotrans-ferase (AST), total bilirubin, γ-glutamyltransferase (GGT), triacylglycerol (TG), total cholesterol (TC), carcinoembryonic antigen (CEA), and CA19-9 were related factors for synCRLM in primary colorectal cancer (n odds ratio=1.101, 0.807, 1.002, 1.017, 1.023, 1.027, 1.012, 0.686, 1.169, 1.007, 1.004, 95% n confidence interval as 1.048-1.156, 0.678-0.960, 1.001-1.004, 1.011-1.024, 1.016-1.031, 1.011-1.044, 1.009-1.015, 0.541-0.869, 1.047-1.306, 1.006-1.008, 1.003-1.004, n P<0.05). Results of multivariate analysis showed that cases as male, case with positive HBsAg, AST, GGT, TC, CEA and CA19-9 were independent risk factors for synCRLM in primary colorectal cancer (n odds ratio=1.503, 2.492, 1.018, 1.007, 1.301, 1.005, 1.003, 95% n confidence interval as 1.038-2.178, 1.443-4.304, 1.003-1.034, 1.003-1.011, 1.112-1.522, 1.003-1.006, 1.002-1.003, n P<0.05), and lymphocytes, ALT and TG were independent protective factors for synCRLM in primary colorectal cancer (n odds ratio=0.777, 0.983, 0.602, 95% n confidence interval as 0.608-0.993, 0.966-0.999, 0.421-0.862, n P<0.05).n Conclusion:Cases as male, case with posotive HBsAg, AST, GGT, TC, CEA and CA19-9 are independent risk factors for synCRLM in primary colorectal cancer, while lymphocytes, ALT and TG are independent protective factors for synCRLM in primary colorectal cancer.