Residence proximity to benzene release sites is associated with increased incidence of non-Hodgkin lymphoma

Catherine Bulka, Loretta J. Nastoupil, William McClellan, Alexander Ambinder, Adrienne Phillips, Kevin Ward, A. Rana Bayakly, Jeffrey M. Switchenko, Lance Waller, Christopher R. Flowers

Research output: Contribution to journalArticlepeer-review

Abstract

Background: An increased risk of non-Hodgkin lymphoma (NHL) has been observed among individuals with occupational exposure to benzene, but the risk among those living near benzene release sites has not been well described. Methods: To investigate the spatial patterns of NHL incidence and the association between NHL incidence and distance to benzene release sites, the authors linked and geocoded data on benzene release sites in Georgia from 1988 to 1998 using the Environmental Protection Agency's (EPA) Toxics Release Inventory (TRI), census tract level population statistics, and NHL incidence from the Georgia Comprehensive Cancer Registry (GCCR) from 1999 to 2008. Standardized incidence ratios were mapped by census tract, and a Poisson regression was performed on NHL and NHL subtype incidence data using the mean distance between the tract centroids and release sites as markers of exposure. Cluster analyses were conducted at the global, local, and focal levels. Results: Poisson regression indicated that, for every mile the average distance to benzene release sites increased, there was an expected 0.31% decrease in the risk of NHL. Similar results were observed for all NHL subtypes analyzed. Clusters of NHL were spatially associated with benzene release sites located in metropolitan areas, but not with release sites in other areas of the state. Conclusions: NHL incidence was significantly higher in census tracts that were closer, on average, to benzene release sites. Additional studies are needed to examine spatial patterns of NHL incidence in other geographic regions and interactions between benzene and other exposures.

Original languageEnglish (US)
Pages (from-to)3309-3317
Number of pages9
JournalCancer
Volume119
Issue number18
DOIs
StatePublished - Sep 15 2013

Keywords

  • benzene
  • geographic information systems
  • lymphoma
  • non-Hodgkin
  • surveillance

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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