In a recent volume of Medical Decision Making, Treadwell and Lenert stated
that under prospect theory, community members compared with patients undere
stimate the utility of health improvements. In this comment, the authors sh
ow that this statement holds only for a subset of possible preference funct
ions. Furthermore, the authors provide arguments that, in general, the rate
r's current health state is not the appropriate reference level if applying
prospect theory to health valuations.