由于对建筑工人接触石棉情况的报道很少,所以作者对1968年前加入当地建筑业联合会的993名建筑工人发给了一份有关他们接触石棉情况的调查表,有597名(67%)工人回答了作者提出的问题。作者要求对这597名工人作进一步的检查、诊断,但只有453名工人同意.受检者平均年龄为59岁,有一 Since few reports of builders’ exposure to asbestos were reported, the authors sent a survey of 993 construction workers who joined the local construction industry federation before 1968 about their exposure to asbestos, 597 (67%) Workers answered the questions posed by the author. The author requested further examination and diagnosis of these 597 workers, but only 453 workers agreed that the average age of the subjects was 59 and there was one