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Der Urologe. Ausg. A · Apr 2013
[Confidence intervals and p-values in urology: interpretation and misinterpretation].
- M Rink, L A Kluth, S F Shariat, R Dahlem, M Fisch, and P Dahm.
- Klinik und Poliklinik für Urologie, Universitätsklinikum Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Deutschland. mrink@uke.uni-hamburg.de
- Urologe A. 2013 Apr 1; 52 (4): 546-8.
AbstractConfidence intervals and p-values are widely used in the urological literature to describe and interpret outcomes. However, several readers, authors and reviewers are unfamiliar with the true interpretation of these values. P-values determine statistical significance of data. Confidence intervals characterize a range of values in which the true effect size is suggested to be with a given degree of certainty. An independent but complementary interpretation of both values is important in studies with and without statistical significance. Based on a clinical case scenario this article discusses the interpretation as well as common pitfalls in interpretation of p-values and confidence intervals. An accurate assessment of these statistical cornerstones is fundamental for a correct interpretation of the urological literature and thus important aspects of evidence-based urology.
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