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. 2011 Apr;102(1):75-80.
doi: 10.1016/j.cmpb.2010.11.002. Epub 2010 Dec 10.

A SAS(®) macro implementation of a multiple comparison post hoc test for a Kruskal-Wallis analysis

Alan C Elliott  1 , Linda S Hynan
Affiliations

A SAS(®) macro implementation of a multiple comparison post hoc test for a Kruskal-Wallis analysis

Alan C Elliott et al. Comput Methods Programs Biomed. 2011 Apr.

Abstract

The Kruskal-Wallis (KW) nonparametric analysis of variance is often used instead of a standard one-way ANOVA when data are from a suspected non-normal population. The KW omnibus procedure tests for some differences between groups, but provides no specific post hoc pair wise comparisons. This paper provides a SAS(®) macro implementation of a multiple comparison test based on significant Kruskal-Wallis results from the SAS NPAR1WAY procedure. The implementation is designed for up to 20 groups at a user-specified alpha significance level. A Monte-Carlo simulation compared this nonparametric procedure to commonly used parametric multiple comparison tests.

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