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Abstract
The incidence of pediatric (i.e., 0–17 y of age) cancers in North Carolina was studied for the years 1990–1993 in counties and ZIP-code areas that contained a National Priorities List hazardous-waste site. We analyzed the areas to determine if there was an excess incidence of cancer among the pediatric population. We used geographic information systems technology to address-match and map the cancer cases, along with county and National Priorities List hazardous waste-site location. No significantly elevated cancer incidence rates were found at the county level. Two ZIP-code areas had statistically significant elevations in cancer incidence (p < .05). Only 3 of the cancer cases we mapped resided within a 1.6-km (1 mi) buffer zone of a National Priorities List hazardous-waste site. These 3 cases were not in the ZIP-code areas that had increased incidence rates. The small numerators throughout the study led us to question the accuracy of the assessment of underlying rates. The general capabilities of the geographic information systems, as well as advantages and limitations of the system, are discussed. As an exploratory study, this study serves as a springboard into more in-depth environmental-health hypotheses and more-specific investigations of point sources of hazardous exposures.
