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为了解接触矽尘与硬皮病发病之间的关系,作者对南非Orange Free州从1981～1986五年内,对金矿的黑人工人中硬皮病的发病情况进行了调查研究。结果,在33～56岁的黑人工人人群中发现了10例硬皮病人,估计年发病率为81.8/百万。在10例硬皮病中有6例、对照组486人中有328例的胸片上有矽肺的征象。从第一次接尘到调查时的平均接尘时间,病例组为23.6±4.9年,对照组为24.8±7年;矽尘的暴露强度,两组无明
To understand the relationship between exposure to silicosis and the onset of scleroderma, the authors investigated the incidence of scleroderma in black workers in the gold mines during the five years from 1981 to 1986 in Orange Free State, South Africa. As a result, 10 cases of scleroderma were found in the black worker population aged 33 to 56 years, with an estimated annual incidence of 81.8 per million. In 10 cases of scleroderma in 6 cases, the control group of 486 people in 328 cases of chest X-ray signs of silicosis. The average dusting time from the first pick-up to the survey was 23.6 ± 4.9 years in the case group and 24.8 ± 7 years in the control group; the exposure intensity of silica dust was not significantly different between the two groups