alexa The Odds Ratio: A Primer for Geriatric Clinicians
ISSN: 2167-7182

Journal of Gerontology & Geriatric Research
Open Access

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The Odds Ratio: A Primer for Geriatric Clinicians

Michael Malek-Ahmadi*
Banner Alzheimer’s Institute, Phoenix, AZ, USA
Corresponding Author : Michael Malek-Ahmadi
Banner Alzheimer’s Institute
901 E. Willetta St. Phoenix, AZ 85006, USA
Tel: +972-54-6650714
E-mail: [email protected]
Received: May 13, 2015; Accepted: June 15, 2015; Published: June 18, 2015
Citation: Malek-Ahmadi M (2015) The Odds Ratio: A Primer for Geriatric Clinicians. J Gerontol Geriatr Res 4:220. doi:10.4172/2167-7182.1000220
Copyright: © 2015 Malek-Ahmadi M. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


The odds ratio (OR) is a statistic that is used to quantify the degree of risk increase or decrease of a particular outcome given the presence of a particular risk factor. The OR is a statistic that is used when the outcome variable is binary (e.g., disease/no disease; yes/no) and can have either categorical or continuous variables as the predictor variable(s). The value of 1.00 is the anchor for which ORs are interpreted in terms of risk increase or decrease. The value of 1.00 indicates no risk increase or decrease, while values greater than 1.00 indicate a risk increase and values less than 1.00 indicate a risk decrease.

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