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PREDXCAT: Stata module to calculate predicted means, medians, or proportions for nominal X's


  • Joanne M. Garrett

    () (University of North Carolina)


predxcat calculates and optionally graphs adjusted means from linear regression models, adjusted medians from quantile regression models, or adjusted proportions from logistic regression models for one or two nominal X variables, adjusted for covariates. If a second X is specified, means, medians or proportions are calculated for all possible combinations of X categories, and an interaction effect is tested. Optionally, model estimates and/or a graph may be displayed. Dummy variables are created for xvar1. The lowest dummy variable defaults to the reference group. If xvar2 is specified, dummy variables are created for it, as well as interaction terms. This is version 3.1.0 of the software, requiring Stata version 8.

Suggested Citation

  • Joanne M. Garrett, 1999. "PREDXCAT: Stata module to calculate predicted means, medians, or proportions for nominal X's," Statistical Software Components S402601, Boston College Department of Economics, revised 17 Nov 2017.
  • Handle: RePEc:boc:bocode:s402601 Note: This module may be installed from within Stata by typing "ssc install predxcat". Windows users should not attempt to download these files with a web browser.

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    means; medians; proportions;


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