Investigation of spatial clustering of biliary tract cancer incidence in Osaka, Japan: Neighborhood effect of a printing factory

Yuri Ito, Tomoki Nakaya, Akiko Ioka, Tomio Nakayama, Hideaki Tsukuma, Shinichiro Uehara, Kyoko Kogawa Sato, Ginji Endo, Tomoshige Hayashi

Research output: Contribution to journalArticlepeer-review

Abstract

Background: In 2013, an unusually high incidence of biliary tract cancer among current or former workers of the offset color proof printing department of a printing company in Osaka, Japan, was reported. The purpose of this study was to examine whether distance from the printing factory was associated with incidence of biliary tract cancer and whether incident biliary tract cancer cases clustered around the printing factory in Osaka using population-based cancer registry data. Methods: We estimated the age-standardized incidence ratio of biliary tract cancer according to distance from this printing factory. We also searched for clusters of biliary tract cancer incidence using spatial scan statistics. Results: We did not observe statistically significantly high or low standardized incidence ratios for residents in each area categorized by distance from the printing factory for the entire sample or for either sex. The scan statistics did not show any statistically significant clustering of biliary tract cancer incidence anywhere in Osaka prefecture in 2004-2007. Conclusions: There was no statistically significant clustering of biliary tract cancer incidence around the printing factory or in any other areas in Osaka, Japan, between 2004 and 2007. To date, even if some substances have diffused outside this source factory, they do not appear to have influenced the incidence of biliary tract cancer in neighboring residents.

Original languageEnglish
Pages (from-to)459-463
Number of pages5
Journaljournal of epidemiology
Volume26
Issue number9
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • Biliary tract cancer
  • Cancer registry
  • Spatial clusters
  • Standardized incidence ratio

ASJC Scopus subject areas

  • Epidemiology

Fingerprint Dive into the research topics of 'Investigation of spatial clustering of biliary tract cancer incidence in Osaka, Japan: Neighborhood effect of a printing factory'. Together they form a unique fingerprint.

Cite this