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Órgano Oficial del Instituto Nacional de Pediatría
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2019, Number 6

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Acta Pediatr Mex 2019; 40 (6)

Diagnostic accuracy research

Díaz-García L, Medina-Vera I, García-de la Puente S, González-Garay A, Murata C
Full text How to cite this article

Language: Spanish
References: 18
Page: 342-357
PDF size: 261.93 Kb.


Key words:

Diagnostic test, Diagnostic accuracy, Bias, sensitivity, Specificity, Likelihood ratio, Pre-test and post-test probability, ROC curve.

ABSTRACT

Background: Diagnostic test studies can be distinguished in five stages, corresponding to different objectives. We focus on Phase III, known as diagnostic accuracy research.
Objective: To provide physicians and other health professionals with an up-to-date introduction to basic concepts and statistical tools in diagnostic accuracy studies.
Description: A diagnostic accuracy study is carried out to determine if the test of interest distinguishes in a daily clinical situation the subjects who have and do not have the disease among the patients with suspicion of the disease. To achieve this objective, selecting a valid reference standard, avoiding characteristic bias in this phase, identifying parameters that quantify the accuracy of the diagnosis and performing appropriate statistical analyzes are of crucial importance.
Conclusions: This research phase must be clearly differentiated within the diagnostic study both for the use of information and for diagnostic accuracy studies. In particular, it is important to notice that the usefulness of the information in Phase II and Phase III is very different. Users of diagnostic tests should know how to correctly apply local data so that the results generated by the index test are appropriate for their clinical context.


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Acta Pediatr Mex. 2019;40