Measures Derived from a 2 x 2 Table for an Accuracy of a Diagnostic Test
Shaffi Ahamed Shaikh*
Department of Family & Community Medicine, College of Medicine, KSU, Riyadh, Kingdom of Saudi Arabia
- *Corresponding Author:
- Shaffi Ahamed Shaikh
Dept. of Family & Community Medicine
College of Medicine, King Saud University
E-mail: [email protected]
Received Date: November 03, 2011; Accepted Date: November 21, 2011; Published Date: December 25, 2011
Citation: Shaikh SA (2011) Measures Derived from a 2 x 2 Table for an Accuracy of a Diagnostic Test. J Biomet Biostat 2:128. doi:10.4172/2155-6180.1000128
Copyright: © 2013 Jung YG. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Diagnostic test studies are receiving increasing attention, but are rather challenging to identify efficiently and reliably. Health care professionals seek information regarding the best available evidence on test accuracy, and there is also a growing requirement to understand the measures of diagnostic tests. An outcome of epidemiological studies, diagnostic tests, and comparative therapeutic trails are often presented in the form of 2 x 2 tables. The analysis from these tables and its significance must be interpreted correctly, so as to answer the clinical research questions of the studies. This article discusses about the measures which could be derived from a 2x2 table format, for a diagnostic test situation, where the interest is to observe the relationship between two qualitative (nominal) variables.