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Influence of Graphic Format on Comprehension of Risk Information among American Indians

Author

Listed:
  • Debra Sprague
  • Donna L. LaVallie
  • Fredric M. Wolf
  • Clemma Jacobsen
  • Kirsten Sayson
  • Dedra Buchwald

Abstract

Background. Presentation of risk information influences patients’ ability to interpret health care options. Little is known about this relationship between risk presentation and interpretation among American Indians. Methods. Three hundred American Indian employees on a western American Indian reservation were invited to complete an anonymous written survey. All surveys included a vignette presenting baseline risk information about a hypothetical cancer and possible benefits of 2 prevention plans. Risk interpretation was assessed by correct answers to 3 questions evaluating the risk reduction associated with the plans. Numeric information was the same in all surveys, but framing varied; half expressed prevention benefits in terms of relative risk reduction and half in terms of absolute risk reduction. All surveys used text to describe the benefits of the 2 plans, but half included a graphic image. Surveys were distributed randomly. Responses were analyzed using binary logistic regression with the robust variance estimator to account for clustering of outcomes within participant. Results. Use of a graphic image was associated with higher odds of correctly answering 3 risk interpretation questions (odds ratio = 2.5, 95% confidence interval = 1.5–4.0, P

Suggested Citation

  • Debra Sprague & Donna L. LaVallie & Fredric M. Wolf & Clemma Jacobsen & Kirsten Sayson & Dedra Buchwald, 2011. "Influence of Graphic Format on Comprehension of Risk Information among American Indians," Medical Decision Making, , vol. 31(3), pages 437-443, May.
    • Handle: RePEc:sae:medema:v:31:y:2011:i:3:p:437-443
    DOI: 10.1177/0272989X10391096
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