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我国城市居民恶性肿瘤死亡率1957年36.9/10万,1990年为128.03/10万,平均年递增率3.8%,其中以肺癌死亡率平均年递增幅度最大(11.9%)。北京市近十几年肺癌发病率、死亡率呈上升趋势。肺癌的病因是复杂的。美国BeckettWS(1993)提出肺癌病因的“Multiplehit”理论来
The death rate of malignant tumors in urban residents in China was 36.9 per 100,000 in 1957 and 128.03 per 100,000 in 1990. The average annual increase rate was 3.8%. The average annual increase rate of lung cancer mortality was the highest (11.9%). ). The incidence and death rate of lung cancer have risen in Beijing over the past decade. The cause of lung cancer is complicated. BeckettWS (1993) proposed the “Multiplehit” theory of the cause of lung cancer.