Davies T A, Doig A T, Fox A J, Greenberg M
Br J Ind Med. 1973 Jul;30(3):227-31. doi: 10.1136/oem.30.3.227.
227-231. A survey of radiographic appearances of the lungs of monumental masonry workers in Aberdeen was carried out to determine the present prevalence of abnormalities and to serve as a standard for future comparisons in view of changes in methods of working. No major change could be detected in the status of these granite workers in Aberdeen over the past 20 years but the different methods of survey used by Mair in 1951 and by the present study did not allow of strict comparison. Chest radiographs were reported on by three readers independently using the National Coal Board elaboration of the ILO classification and a score was given to each film using Oldham's method. Multiple regression analysis showed that ϰ-ray changes were related to years in granite but progression was slow in comparison with foundry workers. The prevalence of radiographic appearances of category 1 or greater was 3·0% overall and 4·6% for workers in dusty jobs. Evidence of pneumoconiosis was not observed in workers exposed for less than 20 years. With the environmental control attained the threshold limit values for respirable dust were not often much exceeded.
227 - 231. 对阿伯丁的纪念性砖石建筑工人的肺部进行了X线表现调查，以确定目前异常情况的患病率，并鉴于工作方法的变化作为未来比较的标准。在过去20年里，阿伯丁这些花岗岩工人的状况未发现重大变化，但1951年梅尔所采用的不同调查方法与本研究采用的方法无法进行严格比较。三位阅片者独立使用国家煤炭委员会对国际劳工组织分类的细化标准对胸部X光片进行报告，并使用奥尔德姆方法对每张片子进行评分。多元回归分析表明，X光改变与从事花岗岩工作的年限有关，但与铸造工人相比进展缓慢。总体而言，1级及以上X线表现的患病率为3.0%，从事多尘工作的工人患病率为4.6%。暴露时间少于20年的工人未观察到尘肺病证据。随着环境得到控制，可吸入粉尘的阈限值并不经常被大幅超过。
