大便隐血试验(FOBT)已被广泛用来发现早期大肠癌.欧美国家于20世纪70年代,开始用FOBT进行了30万人的普查.虽然这些研究报道中说被筛选的人群的早期大肠癌的发现率增加及患者的生存期有显著的延长,但癌症死亡率是否有实质的下降、未见报道. The fecal occult blood test (FOBT) has been widely used to detect early colorectal cancer. In the 1970s, European and American countries began a survey of 300,000 people using FOBT. Although these studies reported that the colorectal cancer of the The discovery rate increased and the patient’s survival period was significantly prolonged, but whether the cancer mortality rate had a substantial decrease was not reported.