Prevention Book

http://www.fpnotebook.com/

Test Sensitivity

Aka: Test Sensitivity
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  1. See Also
    1. Screening Test
    2. Contingency Grid (includes Statistics Example)
    3. Test Specificity
    4. Negative Predictive Value
    5. Positive Predictive Value
    6. Likelihood Ratio
    7. Number Needed to Screen
    8. Length Bias
    9. Leadtime Bias
    10. Selection Bias
  2. Definition
    1. Screening Test's ability to identify true disease
    2. A Test with high sensitivity has few false negatives
    3. Independent of disease Prevalence in the community
  3. Calculation
    1. True positive tests per total affected patients tested
    2. Expressed as a percentage
  4. Example: A new Screening Test for Crohn's Disease
    1. Patients with known Crohn's Disease tested: 45
    2. Patients with known Crohn's Disease who have a positive test: 36
    3. Sensitivity = 36/45 or 80%
  5. References
    1. Hennekens (1987) Epidemiology Medicine, p.327-47
    2. Gates (2001) Am Fam Physician 63(3):513-22
    3. MacLean (1996) Med Clin North Am 80(1):1-14
    4. Nielsen (1999) Med Clin North Am 83(6):1323-37

sensitivity of measurement (C0681900)

Concepts Quantitative Concept (T081)
English sensitivity of measurement
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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