Cited by 1,882Statistical Methods in EpidemiologyMeta-analysis and systematic reviewsClinical Laboratory Practices and Quality Control

Understanding diagnostic tests 3: receiver operating characteristic curves

Akobeng, Anthony K·2007·Acta Paediatrica

Abstract

The results of many clinical tests are quantitative and are provided on a continuous scale. To help decide the presence or absence of disease, a cut‐off point for ‘normal’ or ‘abnormal’ is chosen. The sensitivity and specificity of a test vary according to the level that is chosen as the cut‐off point. The receiver operating characteristic (ROC) curve, a graphical technique for describing and comparing the accuracy of diagnostic tests, is obtained by plotting the sensitivity of a test on the y axis against 1‐specificity on the x axis. Two methods commonly used to establish the optimal cut‐off point include the point on the ROC curve closest to (0, 1) and the Youden index. The area under the ROC curve provides a measure of the overall performance of a diagnostic test. In this paper, the author explains how the ROC curve can be used to select optimal cut‐off points for a test result, to assess the diagnostic accuracy of a test, and to compare the usefulness of tests. Conclusion: The ROC curve is obtained by calculating the sensitivity and specificity of a test at every possible cut‐off point, and plotting sensitivity against 1‐specificity. The curve may be used to select optimal cut‐off values for a test result, to assess the diagnostic accuracy of a test, and to compare the usefulness of different tests.

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Crossref · 10.1111/j.1651-2227.2006.00178.x

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Authors
Akobeng, A. K.
Corresponding author
Akobeng, Anthony K
Venue
Acta Paediatrica
Publisher
Wiley
Published
2007-03-21
Volume
96
Issue
5
Pages
644-647
ISSN
  • 0365-1436 (ISSN-L)
  • 0803-5253
  • 1651-2227
OpenAlex
W2073887351
Cited by
1,882
References
17
Citations by year
2026: 53 · 2025: 95 · 2024: 135 · 2023: 138 · 2022: 167 · 2021: 156 · 2020: 131 · 2019: 116 · 2018: 102 · 2017: 120 · 2016: 113 · 2015: 117 · 2014: 117 · 2013: 98 · 2012: 76
FWCI
29.05
Type
journal article
Language
en
Open access
closed
Locations
  • Acta Paediatrica (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Epidemiology
  • Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
  • Health Sciences › Medicine › Physiology › Clinical Laboratory Practices and Quality Control
Keywords
receiver operating characteristic, diagnostic accuracy, cut-point selection, sensitivity, specificity, Youden index, area under the ROC curve, diagnostic test comparison
MeSH terms
C-Reactive Protein, Calcitonin, Humans, Leukocyte Count, Protein Precursors, ROC Curve, Sensitivity and Specificity, Shock, Septic

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