You are seeing this message because your Web browser does not support basic Web standards. Find out more about why this message is appearing and what you can do to make your experience on this site better.


ABOUT JAMA
Advanced Search

Welcome   | My Account | E-mail Alerts | Access Rights | Sign In


  Vol. 281 No. 1, January 6, 1999 TABLE OF CONTENTS
  JAMA
  •  Online Features
  Letters
 This Article
 •Full text
 •PDF
 •Send to a friend
 • Save in My Folder
 •Save to citation manager
 •Permissions
 Citing Articles
 •Citing articles on ISI (1)
 •Contact me when this article is cited
 Related Content
 •Similar articles in JAMA

Evaluating Reporting and Abstracts of Clinical Trials

Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

To the Editor: We congratulate Dr Scherer and Ms Crawley1 for the first published study to use the Consolidated Standards of Reporting Trials (CONSORT) statement as an instrument to systematically evaluate the quality of the reporting of clinical trials. However, we have some methodological concerns regarding this study.

The authors did not prospectively estimate the sample size that would have resulted in adequate power, and they fail to emphasize the low power as an important limitation, especially since the study in general failed to find significant differences in regard to its hypotheses. The authors mention that "it is possible that our sample size was insufficient to detect subtle changes in reporting," suggesting incorrectly that there was adequate power to detect meaningful changes. Power was further limited by the fact that proportions of certain potential confounders were significantly different across journals; comparisons were made separately for each journal, further lowering the . . . [Full Text of this Article]







HOME | CURRENT ISSUE | PAST ISSUES | TOPIC COLLECTIONS | CME | SUBMIT | SUBSCRIBE | HELP
CONDITIONS OF USE | PRIVACY POLICY | CONTACT US | SITE MAP
 
© 1999 American Medical Association. All Rights Reserved.