MYERS JE, GARISCH D, LOUW SJ. Respiratory health of brickworkers in Cape Town, South Africa: radiographic abnormalities. Scand J Work Environ Health 1989; 15:195-197. A cross-sectional study utilizing internal controls based on dust exposure determinations was performed on 268 brickworkers. Smoking, age, and other information from a detailed respiratory questionnaire and results from a physical examination and pulmonary function tests were investigated in relation to radiographic abnormality. The prevalence of pneumoconiosis was near 4 0J0 . The roles of smoking, workplace dust exposure, and age as factors predicting radiographic abnormality are discussed.
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