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大项府立成人病中心筛检部1986年开展免疫学大使潜血检查，以筛检大肠癌病人，并按期调查所发现大肠癌病人的预后，寻求筛检发现大肠癌病人的5年生存率。方法：截止1991年底，以接受筛检者中诊断由大肠癌的病人为对象，自诊断大肠癌之日起开始观察．掌握直至1996年底的生存和死
In 1986, the screening department of the Adult Health Center of Dajang Prefecture conducted a occult blood test by an immunology ambassador to screen patients with colorectal cancer and to investigate the prognosis of the patients with colorectal cancer on a regular basis and sought to identify the five-year survival rate of patients with colorectal cancer. Methods: By the end of 1991, patients diagnosed with colorectal cancer were screened from the date of diagnosis of colorectal cancer. Master the survival and death until the end of 1996