Understanding interobserver agreement: the kappa statistic.
Publication
, Journal Article
Viera, AJ; Garrett, JM
Published in: Fam Med
May 2005
Items such as physical exam findings, radiographic interpretations, or other diagnostic tests often rely on some degree of subjective interpretation by observers. Studies that measure the agreement between two or more observers should include a statistic that takes into account the fact that observers will sometimes agree or disagree simply by chance. The kappa statistic (or kappa coefficient) is the most commonly used statistic for this purpose. A kappa of 1 indicates perfect agreement, whereas a kappa of 0 indicates agreement equivalent to chance. A limitation of kappa is that it is affected by the prevalence of the finding under observation. Methods to overcome this limitation have been described.
Duke Scholars
Published In
Fam Med
ISSN
0742-3225
Publication Date
May 2005
Volume
37
Issue
5
Start / End Page
360 / 363
Location
United States
Related Subject Headings
- United States
- Observer Variation
- Models, Statistical
- Health Services Research
- General & Internal Medicine
- Family Practice
- 42 Health sciences
- 39 Education
- 32 Biomedical and clinical sciences
- 13 Education
Citation
APA
Chicago
ICMJE
MLA
NLM
Viera, A. J., & Garrett, J. M. (2005). Understanding interobserver agreement: the kappa statistic. Fam Med, 37(5), 360–363.
Viera, Anthony J., and Joanne M. Garrett. “Understanding interobserver agreement: the kappa statistic.” Fam Med 37, no. 5 (May 2005): 360–63.
Viera AJ, Garrett JM. Understanding interobserver agreement: the kappa statistic. Fam Med. 2005 May;37(5):360–3.
Viera, Anthony J., and Joanne M. Garrett. “Understanding interobserver agreement: the kappa statistic.” Fam Med, vol. 37, no. 5, May 2005, pp. 360–63.
Viera AJ, Garrett JM. Understanding interobserver agreement: the kappa statistic. Fam Med. 2005 May;37(5):360–363.
Published In
Fam Med
ISSN
0742-3225
Publication Date
May 2005
Volume
37
Issue
5
Start / End Page
360 / 363
Location
United States
Related Subject Headings
- United States
- Observer Variation
- Models, Statistical
- Health Services Research
- General & Internal Medicine
- Family Practice
- 42 Health sciences
- 39 Education
- 32 Biomedical and clinical sciences
- 13 Education