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1965年以来,日本肝癌研究会每3年一次,对原发性肝癌已进行了4次追踪调查。特别是第4次(1978年)的调查,是初次得到155个单位的协作,把1968～1977年10年的病例(总计4,031例)经病理组织诊断确诊者2,829例,根据个人卡片进行的。这次对1978、1979这2年的病例进行了调查。并且个人卡片的调查项目有所增加并改为便于电子计算机统计的调查用纸。既便于综合作业又使同一病例的研究项目增加便于保存。今后预定每2年进行一次追踪调查。Ⅰ调查对象1978年1月1日到1979年12月31日两年间,全国246个单位,对住院病理解剖与在门诊观察的原发性肝癌,根据日本肝癌研究会追踪调查委员会所制定
Since 1965, the Japanese Society for the Study of Liver Cancer has conducted four follow-up surveys of primary liver cancer once every three years. In particular, the fourth (1978) survey was the first time that 155 units had been collaborated. According to a personal card, 2,829 cases of 1968-1977 10-year cases (a total of 4,031 cases) were confirmed by pathological diagnosis. This time, the cases of the two years 1978 and 1979 were investigated. In addition, survey items for personal cards have been increased and replaced by survey papers that facilitate computer statistics. It is not only convenient for comprehensive operations but also increases the number of research items in the same case for easy preservation. We plan to conduct a follow-up survey every 2 years. I. Investigation object 246 units from January 1, 1978 to December 31, 1979. The pathological anatomy of the hospital and the primary liver cancer observed in the outpatient department were established according to the follow-up investigation committee of the Japanese Society for the Study of Liver Cancer.