滑石接尘矿工呼吸系统损害的调查

对接触滑石尘５年以上的２６７名男性矿工进行了呼吸系统症状阳性率，慢性支气管炎患病率与肺功能损害的调查与分析。结果表明：不论吸烟与否，接尘组咳嗽、咯痰、胸闷，气短等呼吸系统症状阳性率、慢性支气管炎患闰率均显著高于对照组。ＦＶＣ、ＦＥＶ１、ＭＭＦ、ＰＥＦ、Ｖ５０、Ｖ２５等指标实测值／预计值（％）较对照组明显较低，异常率明显升高。多因素分析结果表明：接尘工龄是影响肺功能损害的主要因素，即接尘工龄越长，肺

INVESTIGATION ON RESPIRATORY IMPAIRMENT OF TALC-EXPOSED WORKERS

Respiratory impairment and lung function tests of 267 talc-exposed male workers and 262 control workers were investigated. The results showed that the exposed group has higher incidence of res piratory symptoms, and its FVC, FVE1,MMF, PEF,V50, and V25 values measured/expected are significantly lowered comparing with those of control group(P<0.05 or 0.01)indicating high prevalence of lung function abnormalities. It could be concluded that talc dust could induce the res piratory impairment for the exposed workers. Stepwise regression analysis on exposed workers showed that years of exposure and chronic bronchitis are the main factors causing the impairment.