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Diagnostic Studies Made Easy

  • University of Milan - Bicocca
  • Ain Shams University

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Diagnostic studies have two components: the test result (predictor) and the disease status (outcome). Test sensitivity is the percentage of the true positive results in those having the disease, while test specificity is the percentage of the true negative results in those patients who do not have the disease. The predictive value of a positive test is the probability that a patient with a positive result has the disease, while the predictive value of a negative test is the probability of a patient with a negative result not having the disease. The likelihood ratio is the likelihood that a patient having the disease would have a certain result divided by the likelihood that a patient without the disease would have the same result. Receiver operating characteristics (ROC) curves illustrate the diagnostic characteristics of a test having an ordinal or continuous result.

Original languageEnglish
Title of host publicationHot Topics in Acute Care Surgery and Trauma
PublisherSpringer Nature
Pages17-28
Number of pages12
DOIs
StatePublished - 2022

Publication series

NameHot Topics in Acute Care Surgery and Trauma
VolumePart F4664
ISSN (Print)2520-8284
ISSN (Electronic)2520-8292

Keywords

  • Diagnostic study
  • Likelihood ratio
  • Outcome
  • Predictor
  • Prior probability
  • Sensitivity
  • Specificity

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