在对同一类钢铁工人的流行病学的调查中,作者报导了对141名粉尘采样和样品分析工人的调查结果。这些工人年令在23至51岁之间,平均工作年限16年多。根据殴洲钢铁委员会调查表,一氧化碳试验(Tco)和最大中期呼气流速的测定,主要所见有:自觉和临床上的支气管症状和仪器检查结果异常(仪器检查包括X线,心电图,肺呼吸量测定)。由既往史确定为慢性支气管炎的占19.1％,31％以上的工人自诉有呼吸道症状,21％的工人临床上出现呼吸道症状,15.6%的工人有支气管梗阻 In an epidemiological survey of the same group of steelworkers, the authors reported the findings of 141 dust sampling and sample analysis workers. These workers are between the ages of 23 and 51, with an average length of service of more than 16 years. According to the Questionnaire Steel Council Questionnaire, the carbon monoxide test (TCO) and the maximum mid-term expiratory flow rate, the main findings are: consciously and clinically abnormal bronchial and instrumental findings (instrumental tests including X-ray, electrocardiogram, lung respiration Quantity Measurement). 19.1% and 31% of the workers identified as chronic bronchitis by past history had respiratory symptoms, 21% had clinically respiratory symptoms, and 15.6% had bronchial obstruction