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The Impact of Numeracy on Verbatim Knowledge of the Longitudinal Risk for Prostate Cancer Recurrence following Radiation Therapy

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Listed:
  • Daniel A. Hamstra
  • Skyler B. Johnson
  • Stephanie Daignault
  • Brian J. Zikmund-Fisher
  • Jeremy M. G. Taylor
  • Knoll Larkin
  • Alexander Wood
  • Angela Fagerlin

Abstract

Objective . Given the long natural history of prostate cancer, we assessed differing graphical formats for imparting knowledge about the longitudinal risks of prostate cancer recurrence with or without ‘hormone’ or ‘androgen deprivation’ therapy. Methods . Male volunteers without a history of prostate cancer were randomized to 1 of 8 risk communication instruments that depicted the likelihood of prostate cancer returning or spreading over 1, 2, and 3 years. The tools differed in format (line, pie, bar, or pictograph) and whether the graph also included no numbers, 1 number (indicating the number of affected individuals), or 2 numbers (indicting both the number affected and the number unaffected). The main outcome variables evaluated were graphical preference and knowledge. Results . A total of 420 men were recruited; respondents were least familiar and experienced with pictographs ( P

Suggested Citation

  • Daniel A. Hamstra & Skyler B. Johnson & Stephanie Daignault & Brian J. Zikmund-Fisher & Jeremy M. G. Taylor & Knoll Larkin & Alexander Wood & Angela Fagerlin, 2015. "The Impact of Numeracy on Verbatim Knowledge of the Longitudinal Risk for Prostate Cancer Recurrence following Radiation Therapy," Medical Decision Making, , vol. 35(1), pages 27-36, January.
    • Handle: RePEc:sae:medema:v:35:y:2015:i:1:p:27-36
    DOI: 10.1177/0272989X14551639
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    References listed on IDEAS

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    1. Brian J. Zikmund‐Fisher & Angela Fagerlin & Peter A. Ubel, 2005. "What's Time Got to Do with It? Inattention to Duration in Interpretation of Survival Graphs," Risk Analysis, John Wiley & Sons, vol. 25(3), pages 589-595, June.
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    Cited by:

    1. Christina Kreuzmair & Michael Siegrist & Carmen Keller, 2017. "Does Iconicity in Pictographs Matter? The Influence of Iconicity and Numeracy on Information Processing, Decision Making, and Liking in an Eye‐Tracking Study," Risk Analysis, John Wiley & Sons, vol. 37(3), pages 546-556, March.
    2. Lyndal J. Trevena & Carissa Bonner & Yasmina Okan & Ellen Peters & Wolfgang Gaissmaier & Paul K. J. Han & Elissa Ozanne & Danielle Timmermans & Brian J. Zikmund-Fisher, 2021. "Current Challenges When Using Numbers in Patient Decision Aids: Advanced Concepts," Medical Decision Making, , vol. 41(7), pages 834-847, October.
    3. Sushant Govindan & Katherine Prenovost & Vineet Chopra & Theodore J Iwashyna, 2018. "A comprehension scale for central-line associated bloodstream infection: Results of a preliminary survey and factor analysis," PLOS ONE, Public Library of Science, vol. 13(9), pages 1-11, September.

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