title: Common pitfalls in statistical analysis: Odds versus risk.
abstract: In biomedical research, we are often interested in quantifying the relationship between an exposure and an outcome. "Odds" and "Risk" are the most common terms which are used as measures of association between variables. In this article, which is the fourth in the series of common pitfalls in statistical analysis, we explain the meaning of risk and odds and the difference between the two.
authors.affiliation: Department of Anaesthesiology, Tata Memorial Centre, Lucknow, India.
authors.forename: Priya
authors.initials: P
authors.lastname: Ranganathan
authors.affiliation: Department of Gastroenterology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.
authors.forename: Rakesh
authors.initials: R
authors.lastname: Aggarwal
authors.affiliation: Department of Surgical Oncology, Division of Thoracic Surgery, Tata Memorial Centre, Parel, Mumbai, Maharashtra.
authors.forename: C S
authors.initials: CS
authors.lastname: Pramesh
keywords: Biostatistics; odds ratio; risk