Weiss W, Theodos P A
J Occup Med. 1978 May;20(5):341-5.
The chest roentgenograms of employees aged 40 and over in two asbestos manufacturing plants were read by consensus without knowledge of the plant or smoking habits. Plant A used only chrysotile asbestos throughout its history and Plant B used amosite as well as chrysotile, the amosite being limited to the period 1950-64. The prevalence of pulmonary disease was 25% in Plant A and 33% in Plant B. The prevalence of pleural thickening was 18% in Plant A and 35% in Plant B. Neither age nor work duration were factors in these differences. In Plant A there was no obvious relationship between smoking and pleuropulmonary disease. In Plant B there was a definite relationship of smoking to pulmonary disease and perhaps to pleural thickening. Both type of asbestos and smoking habits appear to be determinants of pleuropulmonary disease in asbestos workers.
两家石棉制造厂40岁及以上员工的胸部X光片由多人共同阅片，阅片者并不知晓员工所在工厂及吸烟习惯。工厂A在其整个历史中仅使用温石棉，工厂B除使用温石棉外还使用铁石棉，铁石棉的使用仅限于1950年至1964年期间。工厂A的肺部疾病患病率为25%，工厂B为33%。工厂A的胸膜增厚患病率为18%，工厂B为35%。年龄和工作时长均不是造成这些差异的因素。在工厂A，吸烟与胸膜肺部疾病之间没有明显关联。在工厂B，吸烟与肺部疾病以及可能与胸膜增厚之间存在明确关联。石棉类型和吸烟习惯似乎都是石棉工人胸膜肺部疾病的决定因素。
