Tags:
create new tag
, view all tags, tagging instructions

Example: Cumulative Incidence - Denominator - GI Illness

Lead Author(s): Jeff Martin, MD

GI Outbreak

MMWR reported "Pleisomonas shigelloides and Salmonella serotype Hartford Infections Associated with a Contaminated Water Supply - Livingston County, New York, 1996".

"On June 24, 1996, the Livingston County (New York) Department of Health (LCDOH) was notified of a cluster of diarrheal illness following a party on June 22, at which approximately 30 persons had become ill.

  • Plesiomonas shigelloides and Salmonella serotype Hartford were identified as the cause of the outbreak.
  • 98 attendees were interviewed. 56 (57%) of 98 respondents had illnesses meeting the case definition." This is an example of a CDC outbreak investigation.

Cumulative Incidence

So the cumulative incidence of diarrheal illness in their cohort of 98 following the party was 57% (56/98).
  • No time period is explicitly mentioned, but technically this is cumulative incidence over a few days following the party.
  • Complete follow-up is possible because the time period is very short.

Denominator

The denominator is the entire study population - 98 individuals.

References

Pleisomonas shigelloides and Salmonella serotype Hartford Infections Associated with a Contaminated Water Supply - Livingston County, New York, 1996. (1998). MMWR, 47 (19), 394 – 396


Topic revision: r3 - 10 Jun 2009 - 14:52:25 - MaryB?
 

Copyright & by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding CTSPedia? Send feedback