Med Decis Making - Protocols for time tradeoff valuations of health states worse than dead: a literature review.

Tópicos

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Resumo

CKGROUND: The time tradeoff (TTO) method of preference elicitation allows respondents to value a state as worse than dead, generally either through the Torrance protocol or the Measurement and Valuation of Health (MVH) protocol. Both of these protocols have significant weaknesses: Valuations for states worse than dead (SWD) are elicited through procedures different from those for states better than dead (SBD), and negative values can be extremely negative.PURPOSE: To provide an account of the different TTO designs for SWD, to identify any alternatives to the MVH and Torrance approaches, and to consider the merits of the approaches identified.METHODS: Medline was searched to identify all health state valuation studies employing TTO. The ways in which SWD were handled were recorded. Furthermore, to ensure that there are no unpublished but feasible TTO variants, the authors developed a theoretical framework for identifying all potential variants.RESULTS: The search produced 593 hits, of which 218 were excluded. Of the remaining 375 articles, only 29 included protocols for SWD. Of these, 23 used the MVH protocol and 4 used the Torrance protocol. The other 2 used 1 protocol for SBD and SWD, one making use of lead time and the other using a 2-stage procedure with chaining. The systematic framework did not identify any alternatives to the Torrance and MVH protocols that were superior to the lead time approach.CONCLUSIONS: Few studies elicit values for SWD. The lead time approach is a potential alternative to the Torrance and MVH protocols. Key words: QALY; states worse than dead; health state valuation; preference elicitation.

Resumo Limpo

ckground time tradeoff tto method prefer elicit allow respond valu state wors dead general either torranc protocol measur valuat health mvh protocol protocol signific weak valuat state wors dead swd elicit procedur differ state better dead sbd negat valu can extrem negativepurpos provid account differ tto design swd identifi altern mvh torranc approach consid merit approach identifiedmethod medlin search identifi health state valuat studi employ tto way swd handl record furthermor ensur unpublish feasibl tto variant author develop theoret framework identifi potenti variantsresult search produc hit exclud remain articl includ protocol swd use mvh protocol use torranc protocol use protocol sbd swd one make use lead time use stage procedur chain systemat framework identifi altern torranc mvh protocol superior lead time approachconclus studi elicit valu swd lead time approach potenti altern torranc mvh protocol key word qali state wors dead health state valuat prefer elicit

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