The odds ratio [1][2][3] is a measure of effect size, describing the strength of association or non-independence between two binary data values. It is used as a descriptive statistic, and plays an important role in logistic regression.

References

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  1. Cornfield, J. "A method of estimating comparative rates from clinical data. Applications to cancer of the lung, breast, and cervix". Journal of the National Cancer Institute 11: 1269–1275. 
  2. Mosteller, Frederick (1968). "Association and Estimation in Contingency Tables". Journal of the American Statistical Association 63 (321): 1–28. http://www.jstor.org/stable/2283825. 
  3. Edwards, A.W.F. (1963). "The measure of association in a 2x2 table". Journal of the Royal Statistical Society, Series A 126 (1): 109–114. http://www.jstor.org/stable/2982448. 
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