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Organophosphate Pesticide Exposure Among Pome and Non-Pome Farmworkers: A Subgroup Analysis of a Community Randomized Trial

Coronado, Gloria D. PhD; Vigoren, Eric M. MS; Griffith, William C. PhD; Faustman, Elaine M. PhD; Thompson, Beti PhD

Journal of Occupational and Environmental Medicine: April 2009 - Volume 51 - Issue 4 - p 500-509
doi: 10.1097/JOM.0b013e31819b9ce8
Original Articles

Objective: We examined the effectiveness of a community randomized intervention among farmworkers who did and did not work in pome fruit (apples and pears).

Methods: Urine samples were collected from two cross-sectional groups of farmworkers and analyzed for the presence of dimethylthiophosphate.

Results: There was no significant time by crop interaction for changes in urinary metabolite concentrations among adult farmworkers (P = 0.79 pome fruit workers; P = 0.83 non-pome fruit workers) or their children (P = 0.25 children of pome fruit workers; P = 0.91 children of non-pome fruit workers). We found greater urinary metabolite concentrations of dimethylthiophosphate among pome fruit workers (compared with non-pome fruit workers) and among workers at final data collection (compared with baseline).

Conclusion: Further research is needed to identify effective interventions to reduce pesticide exposure in farmworkers and their children.

From the Cancer Prevention Research Program (Dr Coronado, Dr Thompson), Fred Hutchinson Cancer Research Center, Seattle, Wash; and Department of Environmental and Occupational Health Sciences (Dr Vigoren, Dr Griffith, Dr Faustman), School of Public Health and Community Medicine, University of Washington, Seattle, Wash.

No conflicts of interest were reported by any authors of this manuscript.

Address correspondence to: Gloria D. Coronado, PhD, Cancer Prevention Research Program, Fred Hutchinson Cancer Research Center, P.O. Box 19024, 1100 Fairview Ave. N; M3-B232, Seattle, WA 98109; E-mail:

©2009The American College of Occupational and Environmental Medicine