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Correction to: Baseline-adjusted proportional odds models for the quantification of treatment effects in trials with ordinal sum score outcomes

BMC Medical Research Methodology volume 20, Article number: 186 (2020) Cite this article

The Original Article was published on 06 May 2020

Correction to: BMC Med Res Methodol (2020) 20:104

https://doi.org/10.1186/s12874-020-00984-2

Following publication of the original article [1], the authors would like to correct the formula of the Polr model equation in the paragraph under the heading Enhanced proportional odds logistic regression (ePolr).

The formula currently reads:

$$ \mathrm{P}\left({\mathrm{Y}}^{\mathrm{III}}\le {\mathrm{y}}^{\mathrm{III}}\left|x\right.\;\right)=\mathrm{expit}\left(h\left({\mathrm{y}}^{\mathrm{III}}\left|{\mathrm{y}}^0\right.\right)+\beta \cdot x\right)\;\left(\mathrm{Polr}\right) $$

The formula should read:

$$ \mathrm{P}\left({\mathrm{Y}}^{\mathrm{III}}\le {\mathrm{y}}^{\mathrm{III}}\left|x\right.\;\right)=\mathrm{expit}\left(h\left({\mathrm{y}}^{\mathrm{III}}\right)+\beta \cdot x\right)\;\left(\mathrm{Polr}\right) $$

The original article [1] has been corrected.

Reference

  1. Buri, et al. BMC Med Res Methodology. 2020;20:104. https://doi.org/10.1186/s12874-020-00984-2.

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Authors and Affiliations

  1. Department of Biostatistics, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Hirschengraben 84, CH-8001, Zurich, Switzerland

    Muriel Buri & Torsten Hothorn

  2. University Hospital Balgrist, Spinal Cord Injury Center, Forchstrasse 340, CH-8008, Zurich, Switzerland

    Armin Curt

  3. International Collaboration On Repair Discoveries (ICORD), University of British Columbia, Vancouver/Kelowna, Canada

    John Steeves

Authors
  1. Muriel Buri
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  2. Armin Curt
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  3. John Steeves
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  4. Torsten Hothorn
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Corresponding author

Correspondence to Torsten Hothorn.

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Buri, M., Curt, A., Steeves, J. et al. Correction to: Baseline-adjusted proportional odds models for the quantification of treatment effects in trials with ordinal sum score outcomes. BMC Med Res Methodol 20, 186 (2020). https://doi.org/10.1186/s12874-020-01028-5

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  • DOI: https://doi.org/10.1186/s12874-020-01028-5

BMC Medical Research Methodology

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