The NIOSH Retrospective Pesticide Reference Database

Area of Science:

• Occupational Health
• Environmental Epidemiology
• Toxicology

Background:

• Pesticide exposure is critical in occupational health studies, particularly for non-metropolitan residents.
• Accurate classification of self-reported pesticide use is challenging due to the variety of products and recall limitations.

Purpose of the Study:

• To develop a comprehensive database for classifying pesticide exposures in a case-control study of glioma.
• To group pesticide responses into biologically relevant categories for improved data analysis.

Main Methods:

• Built the NIOSH Retrospective Pesticide Reference Database (NIOSH-RPRD) using over 1000 pesticide products and chemicals.
• Incorporated data on product registration, ingredients, pesticide class, carcinogenicity, and endocrine-disrupting activity from multiple sources.
• Merged participant-reported pesticide use with the database to link recalled products to specific chemicals.

Main Results:

• The database linked 1347 different pesticides reported by respondents across farm, occupational, and home settings.
• A significant portion of responses named products rather than specific chemicals (60% farm, 59% non-farm, 65% home).
• A notable percentage of farm pesticide users (46%) reported using pesticides up to 40 years before their market introduction, indicating recall bias.

Conclusions:

• The NIOSH-RPRD is a valuable tool for evaluating, grouping, and correcting pesticide exposure data.
• The database enhances the ability to analyze pesticide use in epidemiological studies, improving accuracy and biological relevance.
• Availability of the NIOSH-RPRD to other researchers facilitates more robust investigations into pesticide-related health outcomes.