groupwiseCMH function

Post-hoc tests for Cochran-Mantel-Haenszel test

Conducts groupwise tests of association on a three-way contingency table.

groupwiseCMH(
  x,
  group = 3,
  fisher = TRUE,
  gtest = FALSE,
  chisq = FALSE,
  method = "fdr",
  correct = "none",
  digits = 3,
  ...
)

Arguments

• x: A three-way contingency table.
• group: The dimension of the table to use as the grouping variable. Will be 1, 2, or 3.
• fisher: If TRUE, conducts Fisher exact test.
• gtest: If TRUE, conducts G test of association.
• chisq: If TRUE, conducts Chi-square test of association.
• method: The method to use to adjust p-values. See ?p.adjust.
• correct: The correction to apply to the G test. See GTest.
• digits: The number of digits for numbers in the output.
• ...: Other arguments passed to chisq.test or GTest.

Returns

A data frame of groups, test used, p-values, and adjusted p-values.

Details

If more than one of fisher, gtest, or chisq is set to TRUE, only one type of test of association will be conducted.

Examples

### Post-hoc for Cochran-Mantel-Haenszel test
data(AndersonBias)
Table = xtabs(Count ~ Gender + Result + County,
              data=AndersonBias)
ftable(Table)
mantelhaen.test(Table)
groupwiseCMH(Table,
             group   = 3,
             fisher  = TRUE,
             gtest   = FALSE,
             chisq   = FALSE,
             method  = "fdr",
             correct = "none",
             digits  = 3)

References

https://rcompanion.org/handbook/H_06.html

See Also

nominalSymmetryTest, pairwiseMcnemar, pairwiseNominalIndependence, pairwiseNominalMatrix

Author(s)

Salvatore Mangiafico, mangiafico@njaes.rutgers.edu