Glossary A–Z

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Attack Rate

A cumulative incidence measure used in outbreak settings.

Systematic error that distorts a study estimate.

Study comparing prior exposure among cases and controls.

Study following exposed and unexposed groups over time.

Mixing of effects between an exposure and another factor.

Constant presence of a disease in a region or population.

Occurrence of disease above expected levels in a community.

Number of new cases in a population over a period.

Epidemic spread across multiple countries or continents.

Proportion of a population with a condition at a point or period.

Ongoing systematic collection and interpretation of health data.