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Eliciting utilities using functional methodology: people's disutilities for the adverse outcomes of cardiopulmonary
Alexandra Gamelin1, María Teresa Muñoz Sastre, Paul Clay Sorum
1IUT B, Université François-Rabelais, Tours, France.
Objective:
To evaluate the functional methodology of Norman H. Anderson in eliciting utilities for health outcomes.
Methods:
Lay people in Tours, France, rated the undesirability of 40 scenarios of possible outcomes of cardiopulmonary resuscitation on individual linear scales (Study 1) or on a single long scale (Study 2). The outcomes were either 1 of 8 undesirable outcomes, combined with 1 of 5 likelihoods, or else complete recovery, combined with the complementary likelihood.
Results:
The mean utilities were consistent with previous studies. On the individual level, the internal coherence of most participants' ratings - defined as the consistency and regularity of the graphic representation of their ratings - improved in Study 1 from their 1st to their 2nd rating. The single scale took less time, but allowed participants to disregard the information about likelihood.
Conclusions:
Functional methodology provides a powerful means of checking on the understanding and consistency of each person whose utilities are elicited.
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