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Cancer incidence in the United Farmworkers of America (UFW), 1987–1997
Author(s) -
Mills Paul K.,
Kwong Sandy
Publication year - 2001
Publication title -
american journal of industrial medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 104
eISSN - 1097-0274
pISSN - 0271-3586
DOI - 10.1002/ajim.1125
Subject(s) - medicine , population , odds ratio , cervical cancer , cancer , cancer registry , demography , record linkage , incidence (geometry) , cervix , gynecology , surgery , environmental health , physics , sociology , optics
Background The purpose of this study was to evaluate cancer incidence in the membership a largely Hispanic farmworker labor union in California, the United Farmworkers of America (UFW) and to examine cancer‐site specific distributions as well as histology and stage of cancer at diagnosis in this group. Methods An electronic record linkage was conducted between a membership roster of the UFW and the database of the California Cancer Registry, the population‐based cancer registry in California for the years 1987–1997. Based upon the results of the linkage, morbidity odds ratios were calculated using the distribution of cancer in the California Hispanic population as the reference to determine if risk of specific cancers was higher or lower in the UFW. Time since first joining the union was evaluated, as was the proportional distribution of histologic subtypes and stage at diagnosis, again comparing the experience of the UFW membership to the California Hispanic population. Results Several types of cancer were elevated in the UFW membership in comparison to the California Hispanic population. Morbidity odds ratios and 95% confidence limits were elevated for leukemia (O.R. = 1.59: 95% C.I. = 1.07–2.37), stomach cancer (O.R. = 1.69: 95% C.I. = 1.24–2.27), uterine cervix cancer (O.R. = 1.63: 95% C.I. = 1.11–2.44) and uterine corpus cancer (O.R. = 1.68: 95% C.I. = 1.05–2.67). Brain cancer was also elevated although not significantly so (O.R. = 1.57: 95% C.I. = 0.96–2.53). Conclusions Risk of leukemia, stomach, cervix and uterine cancers was elevated in California farmworkers. The histologic distribution of leukemia and brain cancers within the UFW membership did not differ from the distribution in the general California population although small numbers of cancers in the UFW hindered interpretation of these results. Members of the UFW experienced later stage of disease at diagnosis in comparison to California Hispanics for most major cancer sites but not for breast cancer. Am. J. Ind. Med. 40:596–603, 2001. © 2001 Wiley‐Liss, Inc.