Statistical Guideline #3: Designate and Justify Covariates A Priori, and Report Results With and Without Covariates
From the Editors: This is one in a series of statistical guidelines designed to highlight common statistical considerations in behavioral medicine research. The goal was to briefly discuss appropriate ways to analyze and present data in the International Journal of Behavioral Medicine (IJBM). Collectively, the series will culminate in a set of basic statistical guidelines to be adopted by IJBM and integrated into the journal’s official Instructions for Authors and also to serve as an independent resource. If you have ideas for a future topic, please email the Statistical Editor, Suzanne Segerstrom at email@example.com.
KeywordsStatistical guidelines Covariates Statistical control Statistical adjustment
Compliance with Ethical Standards
Conflict of Interest
The author declares that she has no conflicts of interest.
Human and Animal Rights
This article does not contain any studies with human participants or animals performed by the author, and so there was no requirement for informed consent.
- 2.Segerstrom SC. Statistical Guideline #2. Report appropriate reliability for your sample, measure, and design. Int J Behav Med. In press.Google Scholar
- 8.Flack VF, Chang PC. Frequency of selecting noise variables in subset regression analysis: a simulation study. Am Stat. 1987;41:84–6.Google Scholar
- 9.Revenson TA. All other things are not equal: an ecological perspective on the relation between personality and disease. In: Friedman HS, editor. Personality and disease. New York: Wiley; 1990. p. 65–94.Google Scholar