Definitions of attributable risk--revisited

Area of Science:

• Epidemiology
• Public Health

Background:

• Attributable risk is a key concept for assessing population-level disease risk associated with specific exposures.
• This paper provides a comprehensive review of the epidemiologic concept of attributable risk.

Purpose of the Study:

• To compare and clarify four distinct measures of attributable risk found in epidemiologic literature.
• To address and resolve terminological confusion surrounding attributable risk measures.
• To highlight the intrinsic relationships between different attributable risk definitions.

Main Methods:

• Comparative analysis of four definitions of attributable risk.
• Introduction of notation for exposure-specific disease events to reveal relationships.
• Discussion of terminological ambiguities in the literature.

Main Results:

• All four attributable risk measures focus on exposure-specific disease incidence but within different subpopulations.
• A German cohort study on lipoprotein fractions and myocardial infarction exemplifies the application of different attributable risk measures.
• The study illustrates how varying definitions yield distinct insights into population risk.

Conclusions:

• Attributable risk calculations are crucial for evaluating the public health impact of exposures.
• Integrating attributable risk assessment into epidemiologic analysis is essential for informed public health strategies.