Document Detail

Investigations on non-inferiority-the Food and Drug Administration draft guidance on treatments for nosocomial pneumonia as a case for exact tests for binomial proportions.
MedLine Citation:
PMID:  22991269     Owner:  NLM     Status:  Publisher    
This paper addresses statistical issues in non-inferiority trials where the primary outcome is a fatal event. The investigations are inspired by a recent Food and Drug Administration (FDA) draft guideline on treatments for nosocomial pneumonia. The non-inferiority margin suggested in this guideline for the endpoint all-cause mortality is defined on different distance measures (rate difference and odds ratio) and is discontinuous. Furthermore, the margin enables considerable power for the statistical proof of non-inferiority at alternatives that might be regarded as clinically unacceptable, that is, even if the experimental treatment is harmful as compared with the control. We investigated the appropriateness of the proposed non-inferiority margin as well as the performance of possible test statistics to be used for the analysis. A continuous variant of the margin proposed in the FDA guideline together with the unconditional exact test according to Barnard showed favorable characteristics with respect to type I error rate control and power. To prevent harmful new treatments from being declared as non-inferior, we propose to add a 'second hurdle'. We discuss examples and explore power characteristics when requiring both statistical significance and overcoming the second hurdle. Copyright © 2012 John Wiley & Sons, Ltd.
Joachim Röhmel; Meinhard Kieser
Related Documents :
14509849 - Feeding habits of chironomid larvae (insecta: diptera) from a stream in the floresta da...
11925069 - Antipredator defense of biological control agent oxyops vitiosa is mediated by plant vo...
23144509 - Discrimination of variable schedules is controlled by interresponse times proximal to r...
23391189 - Which dimensions of food-related lifestyle are likely to be associated with obesity in ...
18760989 - Competitive interactions between larvae of the malaria mosquitoes anopheles arabiensis ...
23332529 - Intake of mediterranean foods associated with positive affect and low negative affect.
16629169 - Inhibition of iron and copper uptake by iron, copper and zinc.
11592669 - Effect of computer keyboard slope and height on wrist extension angle.
2046889 - Corticotropin releasing hormone produces profound anorexigenic effects in the rhesus mo...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-18
Journal Detail:
Title:  Statistics in medicine     Volume:  -     ISSN:  1097-0258     ISO Abbreviation:  Stat Med     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8215016     Medline TA:  Stat Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 John Wiley & Sons, Ltd.
Institute for Epidemiology and Prevention Research, Achterstrasse 30, D-28359, Bremen, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Subunit Organization of a Synechocystis Hetero-Oligomeric Thylakoid FtsH Complex Involved in Photosy...
Next Document:  Is NIH funding predictive of greater research productivity and impact among academic otolaryngologis...