美国对1,394名井下作业的煤矿工人作了为期5年的前瞻性调查,以研究呼吸系统损伤对丧失工作能力提前退休率的影响。经Logistic 回归分析并且校正了其它呼吸系统综合症,呼吸系统功能测量、吸烟和一些人口因素后发现,因丧失工作能力而提前退休与持续性的咳嗽史有关。但是,没有找到测量 The United States conducted a five-year prospective survey of 1,394 coal miners operating underground to study the effects of respiratory injury on the early retirement rate of incapacitated workers. After Logistic regression analysis and correction of other respiratory syndromes, respiratory function measurements, smoking, and some demographic factors, it was found that early retirement due to incapacity was associated with a persistent history of cough. However, no measurement was found