摘要
对北京市制动密封材料厂的1244名接尘职工(其中石棉肺患者115名),用寿命表法和Logistic回归模型进行接尘量与石棉肺发病关系的研究表明,石棉肺的发病概率与累积接尘量之间呈直线相关。若以工作30或40年发病概率小于1%计,则年平均粉尘浓度在1.10～3.13mg/m^3(寿命表法,40年)和0.63～0.78mg/m^3(Logistic回归模型,30年)之间。其对应的粉尘计数浓度为1.44～1.79f/ml和1.35～1.38f/ml。作者建议现行石棉粉尘最高容许浓度应该从2mg/m^3降低到1.5mg/m^3或1.5f/ml。
1244 asbestos exposed workers,among them there were 115 cases of asbestosis were investigated and the dose-response relationship between asbestos exposure and incidence of asbestosis was studied. The medical and environmental data were collected.Cumulative dust exposure(mg·a)was estimated by the summation of the products of using the yeraly average workplace dust concentration(mg/ms)
The results showed that the relationship was in positive correlation. If one worked 30 or 40 years, and took the probability of incidence<1% into account, the average concentration or asbestos dust should be at the range of 1.1-3.13mg /m3 (using method of life-table,40 a) and 0.63-0.78mg/m3 (using logistic regression model, 30a).The gravimetrical dust concentrations were converted into fibre count concentrations according to a study on relationship between fibre and mass concentration.The corresponding fibre count results were 1.44-1.79f/ ml and 1.35-1.38f/ml.
Authers suggest that the hygienic standard for asbestos chrysotile in the air of workplace should be reduced from 2 mg/m3 to 1.5mg/m3 or 1.5f/ml
出处
《工业卫生与职业病》
CAS
CSCD
1991年第3期145-148,共4页
Industrial Health and Occupational Diseases
关键词
石棉肺
石棉接触
接尘量
asbestos exposure
asbestosis
dose-response relationship
