Wolf P, Chiazze L, Ference L
J Occup Med. 1987 Jul;29(7):613-5.
An historical cohort study was conducted among salaried pensioners alive and receiving benefits on Dec 31, 1974, and followed for vital status through Dec 31, 1980. For all causes combined, this cohort experienced mortality levels at or below that of the US population. For all malignant neoplasms combined, workers with plant experience only showed a statistically significant excess (standardized mortality ratio [SMR] = 1.34). This may have been largely due to a significant excess of lung cancer in the same group (SMR = 1.90). Individuals with some plant experience exhibited a significant excess of lung cancer (SMR = 1.48). These findings were not detected among active workers in the same company. There were no causes of death for which the SMR deviated significantly from unity among individuals with research experience.
1974年12月31日对在职且领取养老金的退休人员进行了一项历史性队列研究，并对其直至1980年12月31日的生命状态进行随访。综合所有病因来看，该队列的死亡率等于或低于美国人群。综合所有恶性肿瘤来看，仅在工厂工作过的工人显示出统计学上的显著超额（标准化死亡比[SMR]=1.34）。这可能主要是由于同一组中肺癌显著超额（SMR=1.90）。有过一些工厂工作经历的个体肺癌显著超额（SMR=1.48）。在同一家公司的在职员工中未发现这些结果。有研究经历的个体中，未发现SMR显著偏离1的死因。
