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      Modeling Valuations for EuroQol Health States :

      Medical Care
      Ovid Technologies (Wolters Kluwer Health)

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          Abstract

          It has become increasingly common for preference-based measures of health-related quality of life to be used in the evaluation of different health-care interventions. For one such measure, The EuroQol, designed to be used for these purposes, it was necessary to derive a single index value for each of the 243 health states it generates. The problem was that it was virtually impossible to generate direct valuations for all of these states, and thus it was necessary to find a procedure that allows the valuations of all EuroQol states to be interpolated from direct valuations on a subset of these. In a recent study, direct valuations were elicited for 42 EuroQol health states (using the time trade-off method) from a representative sample of the UK population. This article reports on the methodology that was adopted to build up a "tariff" of EuroQol values from this data. A parsimonious model that fits the data well was defined as one in which valuations were explained in terms of the level of severity associated with each dimension, an intercept associated with any move away from full health, and a term that picked up whether any dimension in the state was at its most severe level. The model presented in this article appears to predict the values of the states for which there are direct observations and, thus, can be used to interpolate values for the states for which no direct observations exist.

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          Valuing health states: a comparison of methods.

          In eliciting health state valuations, two widely used methods are the standard gamble (SG) and the time trade off (TTO). Both methods make assumptions about individual preferences that are too restrictive to allow them to act as perfect proxies for utility. Therefore, a choice between them might instead be made on empirical grounds. This paper reports on a study which compared a "props" (using specifically-designed boards) and a "no props" (using self-completion booklets) variant of each method. The results suggested that both non props variants might be susceptable to framing effects and that TTP props outperformed SG props.
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            Multi-Attribute Preference Functions

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              Measuring Preferences for Health States Worse than Death

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                Author and article information

                Journal
                Medical Care
                Medical Care
                Ovid Technologies (Wolters Kluwer Health)
                0025-7079
                1997
                November 1997
                : 35
                : 11
                : 1095-1108
                Article
                10.1097/00005650-199711000-00002
                9366889
                7886eca1-9aad-4435-8c79-1cdc54409ea4
                © 1997
                History

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