Institutional Subscriptions   Individual Subscriptions 
Editors/Authors   Librarians   Newsletter   Site Tour   A-Z Index   About   Contact Us   Help 
Log In | Log In via Athens
Disable Autosuggest
cochran q test
GLOSSARY
1-2 of 2 results
I2 statistic
The I2 statistic is a test of heterogeneity. I2 can be calculated from Cochrane Q (the most commonly used heterogeneity statistic) according to the formula: I2 = 100% × (Cochrane Q – degrees of freedom) / Cochran Q. Any negative values of I2 are considered equal to 0, so that the range of I2 values is between 0% and 100%.

Cochrane Q
A common test for heterogeneity that assumes the null hypothesis that all the apparent variability between individual study results is due to chance. Cochrane Q generates a probability, presented as a P value, based on a 2 distribution, that between-study differences in results equal to or greater than those observed are likely to occur simply by chance.

RELATED SEARCH
JAMA
JAMA and Archives journals
PubMed
Google Scholar
Not finding what you are looking for? Do a full-text search for 'cochran q test'.
Copyright © American Medical Association. All rights reserved.  |  JAMA  |  McGraw-Hill Global Education Holdings, LLC.
Privacy Notice. Any use is subject to the Terms of Use and Notice. Additional Credits and Copyright Information.
Your IP address is 54.82.116.210