Studies were undertaken to determine if there is a statistical correlation between radon levels and the incidence of salivary gland tumors because of high levels of radon in Pennsylvania. In Part I of the study, the incidence of minor salivary gland tumors accessioned by Temple University, Emory University, and University of Southern California from 1986 to 1988 were correlated with average radon levels in the three locations with the use of standard statistical analyses. In Part II, the occurrence of malignant salivary gland tumors was obtained for each of the 67 counties in Pennsylvania from 1986 to 1988 and correlated statistically with radon levels and population figures in each of those counties. A statistically significant correlation between radon levels and incidence of salivary gland tumors could not be demonstrated in either case.
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