What does analytical epidemiology do?

• A. Analyzes the distribution of disease in terms of person, place, and time
• B. Analyzes associations and tests hypotheses about determinants of disease
• C. Conducts laboratory experiments on pathogens
• D. Records patient medical histories for individual care

Answer: (B)

Analytical epidemiology is about testing hypotheses and identifying determinants of disease by examining associations between exposures and outcomes. It goes beyond simply describing who is affected or where and when, and asks whether a specific exposure is linked to a disease and whether that link might be causal after considering confounding and bias. It relies on analytic study designs, like cohort or case-control studies, to compare outcomes between exposed and unexposed groups and to quantify the strength of associations with measures such as relative risk or odds ratio. For example, to explore whether smoking increases lung cancer risk, you’d compare cancer rates in smokers versus non-smokers, adjust for other factors, and assess whether the association holds. The other activities—describing distribution by person/place/time, conducting laboratory experiments on pathogens, or recording individual medical histories for care—are descriptive, lab, or clinical tasks rather than the analytical testing of determinants.