Document Detail

Levels of evidence in the voice literature.
MedLine Citation:
PMID:  21227644     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The purpose of this study was to evaluate the levels of evidence in the voice literature.
STUDY DESIGN: Retrospective literature review.
METHODS: Retrospective review of all original articles published between January 2004 and December 2009 from four general otolaryngology journals and one subspecialty voice journal. All abstracts related to voice were evaluated and rated as to evidence-based medicine rating, graded levels A-D and 1a-5. Articles were also stratified by time over two consecutive 3-year intervals to assess changes over the time period.
RESULTS: Of the 6052 articles published, 950 (15.6%) were related to voice. Six hundred seventy-three articles (10.2%) were clinical articles, and 277 (4.6%) were basic science. Only 1% of the clinical articles were level A, 17% were level B, 73% were level C, and 9% were level D. No noticeable changes occurred in the levels of evidence over the interval of the first 3 years of the study in comparison to the last 3 years, although there was an increase in the number of basic science articles from 24.4% to 32.4%.
CONCLUSION: Despite strong recent interest in improving the quality of the evidence in the literature, the voice literature remains primarily level C and D with no appreciable change over the past 6 years.
Michael S Benninger
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Publication Detail:
Type:  Journal Article; Review     Date:  2011-01-12
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  25     ISSN:  1873-4588     ISO Abbreviation:  J Voice     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-14     Completed Date:  2012-03-15     Revised Date:  2013-05-02    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  United States    
Other Details:
Languages:  eng     Pagination:  653-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 The Voice Foundation. Published by Mosby, Inc. All rights reserved.
Head and Neck Institute, The Cleveland Clinic, Cleveland, Ohio 44195, USA.
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MeSH Terms
Evidence-Based Practice*
Periodicals as Topic*

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

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