has_specified_input has_specified_output achieves_planned_objective data transformation false positive rate Breslow-Day test for homogeneity of odds ratio 2 2 Orlaith Burke Alejandra Gonzalez-Beltran Breslow-Day test Philippe Rocca-Serra adapted from wikipedia: http://en.wikipedia.org/wiki/Odds_ratio#Statistical_inference polled on June 8th,2013 http://www.biomedcentral.com/1471-2288/11/58#B9 http://www.math.montana.edu/~jimrc/classes/stat524/Rcode/breslowday.test.r the Breslow-Day test is a statistical test which evaluates if the odds ratios are homogenous across N 2x2 contingency tables, for instance several 2x2 contingency tables associated with different strata of a stratified population when evaluating the relationship between exposure and outcome or associated with the different samples coming from several centres in a multicentric study in clinical trial context. 2 by 2 contingency table homogeneity test objective odds ratio Chi-square probability distribution odds ratio homogeneity test homogeneity test p-value ready for release