6/28/2023 0 Comments Graphpad onlineHow to use the contingency table calculatorĮnter your data into the contingency table calculator. Be careful with interpretation, though, as a relationship does not necessarily imply causation! The goal is to determine if the factors are associated, for example, a subject in group 1 may be more likely to be part of the outcome 2 category. Each subject falls into one of the two levels for each factor, which results in four possible categories in all. A 2x2 table means that subjects are separated based on two factors (or questions) with two levels in each factor (groups 1 or 2 for the first factor and outcome 1 or 2 for the second factor). Unlike regression analysis or ANOVA, both of the factors are categorical (rather than numeric variables). An example is comparing subjects with and without some risk factor (such as smoking/non-smoking) and further categorizing by whether they have a disease (such as lung cancer). Contingency tables are used to analyze count data across two or more experimental factors by separating the subjects into the appropriate categories.
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