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An updated algorithm for estimation of pesticide exposure intensity in the Agricultural Health Study.
Coble J; Thomas KW; Hines CJ; Hoppin JA; Dosemeci M; Curwin B; Lubin JH; Freeman LEB; Blair A; Sandler DP; Alavanja MCR
Int J Environ Res Public Health 2011 Dec; 8(12):4608-4622
An algorithm developed to estimate pesticide exposure intensity for use in epidemiologic analyses was revised based on data from two exposure monitoring studies. In the first study, we estimated relative exposure intensity based on the results of measurements taken during the application of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) (n = 88) and the insecticide chlorpyrifos (n = 17). Modifications to the algorithm weighting factors were based on geometric means (GM) of post-application urine concentrations for applicators grouped by application method and use of chemically-resistant (CR) gloves. Measurement data from a second study were also used to evaluate relative exposure levels associated with air blast as compared to hand spray application methods. Algorithm modifications included an increase in the exposure reduction factor for use of CR gloves from 40% to 60%, an increase in the application method weight for boom spray relative to in-furrow and for air blast relative to hand spray, and a decrease in the weight for mixing relative to the new weights assigned for application methods. The weighting factors for the revised algorithm now incorporate exposure measurements taken on Agricultural Health Study (AHS) participants for the application methods and personal protective equipment (PPE) commonly reported by study participants.
Agglutination; Agricultural-workers; Agricultural-chemicals; Pesticides; Insecticides; Pesticides-and-agricultural-chemicals; Exposure-assessment; Mathematical-models; Worker-health; Employee-exposure; Sprays; Gloves; Spraying-equipment; Epidemiology; Medical-monitoring; Surveillance-programs; Personal-protective-equipment; Author Keywords: pesticides; exposure algorithm; epidemiology; 2,4-D; chlorpyrifos; captan
Alavanja, MCR (reprint author), NCI, Occupat & Environm Epidemiol Branch, Div Canc Epidemiol & Genet, NIH, DHHS, 1620 Execut Blvd, Rockville, MD 20892 USA
94-75-7; 2921-88-2; 133-06-2
Issue of Publication
Agriculture, Forestry and Fishing
International Journal of Environmental Research and Public Health
MD; NC; OH
Page last reviewed: October 26, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division