Differences in lung function and prevalence of pneumoconiosis between two kaolin plants.
Baser ME; Kennedy TP; Dodson R; Rawlings W Jr.; Rao NV; Hoidal JR
Br J Ind Med 1989 Nov; 46(11):773-776
Differences in lung function and prevalence of pneumoconiosis between workers at two kaolin factories were studied to investigate the basis for discrepant pulmonary function findings. Spirometric and radiographic data collected in a cross sectional survey of the two facilities were analyzed. The crude relations of independent variables to dependent variables were tested using the chi squared test with continuity correction for discrete variables and the two tailed t-test for continuous variables. Independent variables included facility, years in production, age, height, race, and smoking status. As compared with workers in facility-2, workers in facility-1 had a 2.7 fold greater prevalence of pneumoconiosis even after adjusting for age and years in production. Relative to workers in facility-2, workers in facility-1 had a mean 0.368 liter decrement in adjusted forced vital capacity. The authors conclude that the previous finding that exposure to kaolin (1332587) was not associated with a decrement in lung function may have resulted from failure to consider differences between the two facilities; future studies of the industry should include information on respirable particle size and concentration for calcined versus hydrous kaolin.
NIOSH-Publication; NIOSH-Grant; Occupational-exposure; Lung-function; Pulmonary-function; Pulmonary-function-tests; Factory-workers; Spirometry; Occupational-respiratory-disease; Epidemiology; Mineral-dusts
Medicine University of Tennessee Room H-314, Coleman Bldg Memphis, TN 38163
British Journal of Industrial Medicine
University of Tenn Center Health Scien, Memphis, Tennessee