World Library  
Flag as Inappropriate
Email this Article

Cumulative incidence

Article Id: WHEBN0005075897
Reproduction Date:

Title: Cumulative incidence  
Author: World Heritage Encyclopedia
Language: English
Subject: Incidence (epidemiology), Medical statistics, Incidence, CIF, Risk
Collection: Epidemiology
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Cumulative incidence

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) \cdot D}\, .

See also

References

  1. ^ Rychetnik L, Hawe P, Waters E, Barratt A, Frommer M (July 2004). "A glossary for evidence based public health". J Epidemiol Community Health 58 (7): 538–45.  
  2. ^ Dodge, Y. (2003). The Oxford Dictionary of Statistical Terms. OUP.  
  3. ^ Bouyer, Jean; Hémon, Denis; Cordier, Sylvaine; Derriennic, Francis; Stücker, Isabelle; Stengel, Bénédicte; Clavel, Jacqueline (2009). Épidemiologie principes et méthodes quantitatives. Paris: Lavoisier. 
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.