Cumulative incidence

Short description: Measure of disease frequency during a period of time

Cumulative incidence or incidence proportion is a measure of frequency, as in epidemiology, where it is a measure of disease frequency during a period of time. Where the period of time considered is an entire lifetime, the incidence proportion is called lifetime risk.[1]

Cumulative incidence is defined as the probability that a particular event, such as occurrence of a particular disease, has occurred before a given time.[2] It is equivalent to 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 also referred to as the incidence proportion.

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

It may also be calculated by the incidence rate multiplied by duration:[3]

CI(t)=1−e−IR(t)⋅D.

## See also

* Attack rate
* Epidemiology

## References

1. ↑ "A glossary for evidence based public health". J Epidemiol Community Health 58 (7): 538–45. July 2004. doi:10.1136/jech.2003.011585. PMID 15194712.
2. ↑ Dodge, Y. (2003). The Oxford Dictionary of Statistical Terms. OUP. ISBN 0-19-920613-9. https://archive.org/details/oxforddictionary0000unse.
3. ↑ Bouyer, Jean; Hémon, Denis; Cordier, Sylvaine; Derriennic, Francis; Stücker, Isabelle; Stengel, Bénédicte; Clavel, Jacqueline (2009). Épidemiologie principes et méthodes quantitatives. Paris: Lavoisier.

* v
* t
* e

Clinical research and experimental design

Overview|

* Clinical trial
* Trial protocols
* Adaptive clinical trial
* Academic clinical trials
* Clinical study design

Controlled study
(EBM I to II-1)|

* Randomized controlled trial
* Scientific experiment
* Blind experiment
* Open-label trial

Observational study
(EBM II-2 to II-3)|

* Cross-sectional study vs. Longitudinal study, Ecological study
* Cohort study
* Retrospective
* Prospective
* Case–control study (Nested case–control study)
* Case series
* Case study
* Case report

Measures|

| Occurrence|

Incidence, Cumulative incidence, Prevalence, Point prevalence, Period prevalence

|

Association|

Risk difference, Number needed to treat, Number needed to harm, Risk ratio, Relative risk reduction, Odds ratio, Hazard ratio

Population impact|

Attributable fraction among the exposed, Attributable fraction for the population, Preventable fraction among the unexposed, Preventable fraction for the population

Other|

Clinical endpoint, Virulence, Infectivity, Mortality rate, Morbidity, Case fatality rate, Specificity and sensitivity, Likelihood-ratios, Pre- and post-test probability

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 ratio
* Systematic review
* Replication
* Meta-analysis
* Intention-to-treat analysis

Interpretation of results|

* Selection bias
* Survivorship bias
* Correlation does not imply causation
* Null result

* Category
* Glossary
* List of topics

es:Incidencia#Incidencia acumulada

0.00

(0 votes)

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Medicine:Cumulative_incidence&oldid=856580"
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template