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Chest, Vol 89, 795-799, Copyright © 1986 by American College of Chest Physicians
ARTICLES |
SL Horne, RK Tennent, DW Cockcroft, DJ Cotton and JA Dosman
Twenty-eight men with the Pi MZ phenotype who have been employed in the Saskatchewan country grain elevators and thus regularly exposed to high levels of grain dust, were case matched for age, years of employment, employment status, smoking status, and smoking history with grainworkers of type Pi M. Individuals answered a questionnaire, had a chest roentgenogram, skin tests, and performed a battery of pulmonary function tests. There were no differences between the two groups in prevalence of symptoms or atopy. Although not statistically significant, the MZ group had three times as many individuals with abnormal roentgenograms suggestive of COPD as the M group. The Pi MZ grainworkers had consistently poorer mean results for the pulmonary function tests with significantly lower mean values for FEV1, FEV1/FVC, MMFR, and Vmax50, leading us to suggest that Pi MZ individuals may be at higher risk of COPD than Pi M individuals, but only in the presence of other risk factors such as grain dust exposure.
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