Sample Size Nomograms for Interpreting Negative Clinical Studies.
Publication/Presentation Date
8-1-1983
Abstract
In recent years there has been increasing attention to the appropriate interpretation of a clinical study. One special concern has been the difficulty inherent in interpreting studies that were not statistically significant: Was the sample size sufficient to detect a clinically important effect if, in fact, it existed? This concern is further complicated because readers may have differing opinions of what size effect is clinically important. A pair of sample size nomograms has been developed, using common levels of statistical significance, to assist in this interpretation. The nomograms are intended to provide the clinician with a handy and easy-to-use reference for ascertaining whether an apparently negative study has a sample size adequate to detect reliably any difference between treatment groups that the clinician believes is clinically important. Examples are provided to show these principles and the use of the nomograms in interpreting negative studies.
Volume
99
Issue
2
First Page
248
Last Page
251
ISSN
0003-4819
Published In/Presented At
Young, M. J., Bresnitz, E. A., & Strom, B. L. (1983). Sample size nomograms for interpreting negative clinical studies. Annals Of Internal Medicine, 99(2), 248-251.
Disciplines
Medical Sciences | Medicine and Health Sciences
PubMedID
6881780
LVHN link
http://search.ebscohost.com/login.aspx?direct=true&db=mnh&AN=6881780&site=ehost-live&scope=site
Department(s)
Department of Medicine, Department of Medicine Faculty
Document Type
Article