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正确收集和分析恶性肿瘤发病率和死亡率资料，对于研究肿瘤病因和预防对策，制订防治规划，考核防治效果是十分重要的。启东市自1972年起对全市百万人口进行1958年一1971年恶性肿瘤死亡病例回顾调查，接着相继建立了恶性肿瘤登记报告制度，1974年建立了居民全死因登记报告制度?
Accurately collecting and analyzing data on morbidity and mortality of malignant tumors is very important for studying tumor etiology and preventive measures, formulating prevention and control plans, and assessing the effectiveness of prevention and control. Since 1972, Qidong City conducted a retrospective survey of millions of people in the city from 1958 to 1971, and then successively established a malignant tumor registration and reporting system. In 1974, a resident’s death registration report system was established.