Use of covariates in randomized controlled trials

G.J.P. van Breukelen*, K.R.A. van Dijk

*Corresponding author for this work

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review


A recent discussion in this journal illustrates some recurrentmisunderstandings about the role of covariates in randomized controlledtrials (rcts). This letter aims at clarifying this role and at pointingout a pitfall in spss repeated measures anova. We hope that our commentarywill contribute to a further improvement in the use of advanced statisticsin neuropsychology.
Original languageEnglish
Pages (from-to)903-904
JournalJournal of the International Neuropsychological Society
Issue number5
Publication statusPublished - 1 Jan 2007


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