title: Exposure assessment for retrospective follow-up studies of semiconductor- and storage device-manufacturing workers.
abstract: OBJECTIVE
  This exposure assessment was conducted in the first large study of mortality and cancer incidence in semiconductor and storage device manufacturing.
  
  
  METHODS
  Unique combinations of division, department and job codes and names (DDJ) from work history records were assigned to work groups and exposure categories. Agent exposure matrices assessed differences in potential exposures between groups. Changes in exposure over time were tracked by dividing the production history into manufacturing eras.
  
  
  RESULTS
  Nineteen work groups were developed to capture 310,351 unique DDJs from 1965-1999. Agent exposure matrices contrasted exposure potential to solvents, metals, and work in cleanrooms between groups, and three manufacturing eras were identified for each site.
  
  
  CONCLUSIONS
  The work groups, manufacturing eras and agent matrices have been used to classify workers in the study of cancer incidence and mortality.
authors.affiliation: Department of Environmental Health, Harvard University School of Public Health, Boston, Massachusetts 02215, USA. Herrick@hohp.harvard.edu
authors.forename: Robert F
authors.initials: RF
authors.lastname: Herrick
authors.forename: James H
authors.initials: JH
authors.lastname: Stewart
authors.forename: Drew
authors.initials: D
authors.lastname: Blicharz
authors.forename: Colleen
authors.initials: C
authors.lastname: Beall
authors.forename: Thomas
authors.initials: T
authors.lastname: Bender
authors.forename: Hong
authors.initials: H
authors.lastname: Cheng
authors.forename: Robert
authors.initials: R
authors.lastname: Matthews
authors.forename: Nalini
authors.initials: N
authors.lastname: Sathiakumar
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Delzell
mesh_terms: D016248:Computer Storage Devices; D004812:Epidemiologic Methods; D005500:Follow-Up Studies; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology* / Q000401:mortality; D009784:Occupational Diseases / Q000453:epidemiology* / Q000401:mortality; D016273:Occupational Exposure; D009787:Occupational Medicine / Q000379:methods; D012666:Semiconductors