[Logistic regression analysis of risk factors influencing the occurrence of category III pneumoconiosis in the coal mine].

Using 1:4 matched method, we have selected 40 cases of category III pneumoconiosis and 160 controls in a coal mine, and analyzed the factors which influenced the occurrence of category III pneumoconiosis by Multiple Logistic Regression Model. The results were as follows: Tuberculous infection and the type of radiographic appearance manifested mainly as small round opacities were positively correlated with the attack of category III pneumoconiosis. The time of starting exposure to dust, the years and the kinds of work were not led into regression model as significant factors.