RADIOGRAPHIC ABNORMALITIES AMONG ASBESTOS-CEMENT WORKERS - AN EXPOSURE-RESPONSE STUDY

Abstract
Development was studied of small irregular opacities and bilateral pleural thickening in a longitudinal study of 181 asbestos-cement workers. Relationships between the 32-yr risks of developing abnormalities and cumulative exposure to asbestos dust could be described with log-normal curves. Smokers had higher risks of both abnormalities than did nonsmokers. In this cohort, men leaving asbestos exposure had a risk of radiographic progression similar to men continuing in exposure, and men with abnormal radiographs had higher mortality rates than did men with normal ones.