What significance do published results of medical studies have regarding the etiology, diagnostics, therapy, and prognosis of diseases? What importance do such study results hold for patients? Medical students, as well as doctoral candidates, practicing physicians, and researchers in the medical field who wish to conduct, evaluate, or interpret a clinical study, must grapple with these or similar questions during their examinations. Clinical epidemiology provides the necessary information for this. At the same time, the book lays the groundwork for understanding the principles of evidence-based medicine while largely avoiding the presentation of complex formulas. Numerous illustrations and tables summarize the content clearly and understandably, with current examples related to each chapter.