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Purgato M, Barbui C. Dichotomizing rating scale scores in psychiatry: a bad idea?. Epidemiol Psychiatr Sci. 2012;22(1):17-9doi: 10.1017/S2045796012000613.
Purgato, M., & Barbui, C. (2013). Dichotomizing rating scale scores in psychiatry: a bad idea?. Epidemiology and psychiatric sciences, 22(1), 17-9. https://doi.org/10.1017/S2045796012000613
Purgato, M, and Barbui, C. "Dichotomizing rating scale scores in psychiatry: a bad idea?." Epidemiology and psychiatric sciences vol. 22,1 (2013): 17-9. doi: https://doi.org/10.1017/S2045796012000613
Purgato M, Barbui C. Dichotomizing rating scale scores in psychiatry: a bad idea?. Epidemiol Psychiatr Sci. 2013 Mar;22(1):17-9. doi: 10.1017/S2045796012000613. Epub 2012 Oct 23. PMID: 23089232; PMCID: PMC6998334.
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Epidemiol Psychiatr Sci. 2013 Mar;22(1):17-9. doi: 10.1017/S2045796012000613. Epub 2012 Oct 23.

Dichotomizing rating scale scores in psychiatry: a bad idea?.

Epidemiology and psychiatric sciences

M Purgato, C Barbui

Affiliations

  1. Section of Psychiatry, Department of Public Health and Community Medicine, University of Verona, Verona, Italy.

PMID: 23089232 PMCID: PMC6998334 DOI: 10.1017/S2045796012000613

Abstract

In psychiatry, the use of rating scales as measures of outcome in clinical trials allows us to generate continuous outcome data, where each individual's outcome is measured in numbers. Continuous outcomes can be divided into two categories, such as improved and not improved, or may be kept continuous. This article briefly presents the main advantages and disadvantages of these two approaches, which are commonly employed in the analyses of rating scale scores in clinical trials and systematic reviews.

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