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Assessing Preferences about the DNR Order
Does It Depend on How You Ask?
Myra E. Percy, MSc
Hilary Llewellyn-Thomas, PhD
Despite increasing emphasis on advance directives, there has been little methodologic work to assess preferences about the "do not resuscitate" (DNR) order. This developmental work assessed, in a non-patient group, the performance of a probability-trade-off task designed to assess DNR attitudes, in terms of framing effects and stability of preferences. 105 female nursing students each completed one of two versions of the task. In version I (n = 58), the trade-off moved to increasingly negative descriptions of the outcomes of resuscitation (de creasing chance of survival and increasing risk of brain death), whereas in version II (n = 47), the trade-off moved to increasingly positive descriptions. One week later, repeat as sessments were obtained for versions I (n = 35) and II (n = 28). The DNR preference scores were lower and more stable when the task moved to increasingly positive descriptions; perhaps this version of the task tends to weaken risk aversion. These results imply that care should be used in applying a probability trade-off task to the assessment of DNR preferences, since artefactual effects could be induced. Key words : patients' decision making; prefer ences; trade-offs; resuscitation; anchoring effect. (Med Decis Making 1995;15:209-216)
Medical Decision Making, Vol. 15, No. 3,
209-216 (1995)
DOI: 10.1177/0272989X9501500303
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