Cumulative incidence is a measure of frequency, as in epidemiology, where it is a measure of disease frequency during a period of time.

Cumulative incidence is the incidence calculated using a period of time during which all of the individuals in the population are considered to be at risk for the outcome. It is sometimes referred to as the incidence proportion.

Cumulative incidence is calculated by the number of new cases during a period divided by the number of animals at risk in the population at the beginning of the study.

It may also be calculated by the incidence rate multiplied by duration.

v • d • e Biomedical research: Study designs / Design of experiments Overview Clinical trial · Clinical trial protocol · Clinical trial management · Academic clinical trials · Study design Controlled study (EBM I to II-1; A to B) Randomized controlled trial (Blind experiment, Open-label trial) Observational study (EBM II-2 to II-3; B to C) Cross-sectional study vs. Longitudinal study Cohort study (Retrospective cohort study, Prospective cohort study) Case-control study (Nested case-control study) Case series · Case study/Case report Epidemiology/ methods occurrence: Incidence (Cumulative incidence) · Prevalence (Point prevalence, Period prevalence) association: absolute (Absolute risk reduction, Attributable risk, Attributable risk percent) · relative (Relative risk, Odds ratio, Hazard ratio) other: Virulence · Infectivity · Mortality rate · Morbidity · Case fatality · Specificity and sensitivity · Likelihood-ratio test Trial/test types In vitro/In vivo · Animal testing · Animal testing on non-human primates · First-in-man study · Multicenter trial · Seeding trial · Vaccine trial Analysis of clinical trials Risk-benefit analysis Interpretation of results Selection bias · Correlation does not imply causation · Null result Category • Glossary • List of topics