作者曾分析华盛顿州工人死亡率的资料,发现铝作业工人死亡率较高,为此又对一个大铝厂进行死亡率的深入研究。以该厂工作三年以上的工人为调查对象,与美国全国资料进行比较,计算予计死亡数和标准死亡率之比(SMR),并用卡方进行统计学检验。 作者调查2103人,累计工作年数为44307人年,共死亡400人,各种死因中癌占25％(华盛顿州男性为20％),其中胰癌(SMR 180)、肺癌(SMR 117)、淋巴和造血系统癌(SMR 184),特别是淋巴肉瘤和网状细胞肉瘤(SMR 316)以及脑的致命性良性肿瘤 The authors have analyzed data on worker fatality in Washington State and found that there is a high mortality rate for aluminum workers and, in turn, an in-depth study of the mortality of a large aluminum plant. The workers who worked in the factory for more than three years were surveyed and compared with the national data of the United States to calculate the ratio of expected deaths to standard death rate (SMR). Statistical tests were performed using Chi-square test. The authors surveyed 2,103 people, accumulating a total of 44,307 person-years of work, resulting in a total of 400 deaths, 25% of all death causes (20% of Washington state males), including pancreatic cancer (SMR 180), lung cancer (SMR 117) And hematopoietic cancer (SMR 184), in particular lympho-sarcoma and reticulocytic sarcoma (SMR 316), as well as fatal benign tumors of the brain