Cohort study among workers exposed to benzene in China: I. General methods and resources

S. ‐N Yin, M. S. Linet, R. B. Hayes, G. ‐L Li, M. Dosemeci, Y. ‐Z Wang, W. ‐H Chow, Z. ‐L Jiang, S. Wacholder, W. ‐U Zhang, T. ‐R Dai, X. ‐J Chao, X. ‐C Zhang, P. ‐Z Ye, Q. ‐R Kou, J. ‐F Meng, J. ‐S Zho, X. ‐F Lin, C. ‐Y Ding, R. KnellerW. J. Blot

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

Benzene is recognized internationally as a leukemogen, but the available data to clarify dose‐response relationships and examine risks of malignancies other than leukemia are sparse. A collaborative study was therefore carried out to expand on a previous retrospective cohort mortality study of Chinese benzene‐exposed workers. Methods and resources used in the 16‐year follow‐up of 74,828 benzene‐exposed and 35,805 unex‐posed workers employed for any length of time during 1972–1987 in 712 factories in 12 cities in China are described. Details are provided of the study organization, assessment of benzene exposures since 1949, characterization of factories and workers by exposure status, city, and sex, identification and confirmation of cancers and other deaths, and quality control procedures. The distinguishing features of the study are discussed in relation to earlier cohort studies, and study limitations as well as strengths are presented.

Original languageEnglish (US)
Pages (from-to)383-400
Number of pages18
JournalAmerican Journal of Industrial Medicine
Volume26
Issue number3
DOIs
StatePublished - Sep 1994
Externally publishedYes

Keywords

  • benzene
  • cancer
  • hematopoietic neoplasms
  • leukemia
  • occupational exposure

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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