Quantification of Errors in Ordinal Outcome Scales Using Shannon Entropy: Effect on Sample Size Calculations

• Pitchaiah Mandava ,

  * E-mail: pmandava@bcm.tmc.edu

  Affiliations The Michael E. DeBakey Veterans Affairs Medical Center Comprehensive Stroke Program, Houston, Texas, United States of America, The Stroke Outcomes Laboratory, Department of Neurology, Baylor College of Medicine, Houston, Texas, United States of America

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• Chase S. Krumpelman,

  Affiliation The Stroke Outcomes Laboratory, Department of Neurology, Baylor College of Medicine, Houston, Texas, United States of America

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• Jharna N. Shah,

  Affiliation The Stroke Outcomes Laboratory, Department of Neurology, Baylor College of Medicine, Houston, Texas, United States of America

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• Donna L. White,

  Affiliation Clinical Epidemiology and Comparative Effectiveness Program, Houston Veterans Affairs Health Services Research Center of Excellence, Houston, Texas, United States of America

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• Thomas A. Kent

  Affiliations The Michael E. DeBakey Veterans Affairs Medical Center Comprehensive Stroke Program, Houston, Texas, United States of America, The Stroke Outcomes Laboratory, Department of Neurology, Baylor College of Medicine, Houston, Texas, United States of America

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