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Use of covariates in randomized controlled trials

  • GERARD J.P. VAN BREUKELEN (a1) and KOENE R.A. VAN DIJK (a2) (a3)
Abstract

A recent discussion in this journal illustrates some recurrent misunderstandings about the role of covariates in randomized controlled trials (RCTs). This letter aims at clarifying this role and at pointing out a pitfall in SPSS repeated measures ANOVA. We hope that our commentary will contribute to a further improvement in the use of advanced statistics in neuropsychology.

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Copyright
Corresponding author
Correspondence and reprint requests to: Gerard J.P. Van Breukelen, Department of Methodology & Statistics, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands. E-mail: gerard.vbreukelen@stat.unimaas.nl
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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

Gilmore, G.C. (2007). Inappropriate use of covariate analysis renders meaningless results. Journal of the International Neuropsychological Society, 13, 370.

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Journal of the International Neuropsychological Society
  • ISSN: 1355-6177
  • EISSN: 1469-7661
  • URL: /core/journals/journal-of-the-international-neuropsychological-society
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