What is the purpose of a dose-response assessment in occupational exposure assessment?

• A. To measure actual body burden directly.
• B. To establish permissible exposure limits for the workplace.
• C. To characterize the relationship between dose and adverse health effects using available data.
• D. To determine the manufacturing cost of controls.

Answer: (C)

Understanding how exposure level maps to health outcomes is the goal. Dose-response assessment uses available data from toxicology and human studies to characterize how the likelihood or severity of adverse effects changes with increasing dose. It helps identify if a threshold exists, how steep the relationship is, and what exposure levels correspond to meaningful health risks. This information is essential for estimating risk and informing decisions about acceptable workplace exposures. The other options miss the main point: measuring actual body burden is biomonitoring, not the dose–response relationship; setting permissible exposure limits is a policy action that uses dose–response information but isn’t the assessment’s primary purpose; and calculating costs of controls falls outside this concept.