Diagnostic tests are methods used in clinical practice to accurately diagnose a patient's ailment and hence give prompt and appropriate therapy. The authors are exclusively responsible for reporting high-quality diagnostic test results, for both basic and advanced approaches. Despite the availability of recommendations and standards for statistical content and format, the quality of what and how the statistic is provided when a diagnostic test is evaluated ranged from outstanding to very poor. From the anatomy to the role in clinical practise to the statistical methods used to indicate their performances, this article briefly examines the procedures in the evaluation of a diagnostic test. The statistical approaches are accompanied by examples and are linked to the phase, clinical question, and objective. Phase I and II studies are discussed in greater depth, however phase III and IV research are only briefly discussed statistically. There are also other free internet services that can be used to calculate some data.
