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目的：探讨胃癌术后长期生存与诸因素之间的关系。方法：选用胃癌手术后生存5年以上病人268例为长生存组，术后2年内死亡的病人418例为短生存组，并考察性别、年龄、肿瘤生长部位、肿瘤大小、浸润深度、大体类型、组织学类型、淋巴结转移、手术方式、合并切除、断端癌残留等15项共35个变量，经过数量化处理后．采用logistic判别分析法．计算出影响长期生存的判别函数、判别值。结果：判别作用最强的因素依次为：N3、S3、N2、N1、断端癌浸润、S2、全胃切除，各因素显著性检验P值均远小于0.01，回代检验总符合率8528％。结论：提示多因素判别分析法对于估计预后是一种比较科学、简单而可靠的方法，值得大力推广。
Objective: To explore the relationship between postoperative long-term survival and various factors of gastric cancer. METHODS: A total of 268 patients who survived more than 5 years after surgery for gastric cancer were selected as long-term survival group. 418 patients who died within 2 years after surgery were short-term survival groups. The sex, age, site of tumor growth, tumor size, depth of invasion, and gross type were examined. , histological type, lymph node metastasis, surgical methods, merger resection, residual cancer residue and other 15 items total 35 variables, after quantification. Using logistic discriminant analysis. Calculate discriminant functions and discriminant values that affect long-term survival. Results: The most discriminating factors were as follows:N3,S3,N2,N1,invasive carcinoma of the stump,S2,total gastrectomy. The P value of the significance test of each factor was far less than 0.01, the total compliance rate of the back test was 8528%. . Conclusion: It is suggested that multivariate discriminant analysis is a relatively scientific, simple and reliable method for estimating prognosis, and it is worth promoting.