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The European Journal of Health Economics

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Open Access 01-07-2013 | Original Paper

Introducing the composite time trade-off: a test of feasibility and face validity

Authors: Bas M. F. Janssen, Mark Oppe, Matthijs M. Versteegh, Elly A. Stolk

Published in: The European Journal of Health Economics | Special Issue 1/2013

Abstract

Introduction

This study was designed to test the feasibility and face validity of the composite time trade-off (composite TTO), a new approach to TTO allowing for a more consistent elicitation of negative health state values.

Methods

The new instrument combines a conventional TTO to elicit values for states regarded better than dead and a lead-time TTO for states worse than dead.

Results

A total of 121 participants completed the composite TTO for ten EQ-5D-5L health states. Mean values ranged from −0.104 for health state 53555 to 0.946 for 21111. The instructions were clear to 98 % of the respondents, and 95 % found the task easy to understand, indicating feasibility. Further, the average number of steps taken in the iteration procedure to achieve the point of indifference in the TTO and the average duration of each task were indicative of a deliberate cognitive process.

Conclusion

Face validity was confirmed by the high mean values for the mild health states (>0.90) and low mean values for the severe states (<0.42). In conclusion, this study demonstrates the feasibility and face validity of the composite TTO in a face-to-face standardized computer-assisted interview setting.

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Title: Introducing the composite time trade-off: a test of feasibility and face validity
Authors: Bas M. F. Janssen
Mark Oppe
Matthijs M. Versteegh
Elly A. Stolk
Publication date: 01-07-2013
Publisher: Springer Berlin Heidelberg
Published in: The European Journal of Health Economics / Issue Special Issue 1/2013
Print ISSN: 1618-7598
Electronic ISSN: 1618-7601
DOI: https://doi.org/10.1007/s10198-013-0503-2

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Introducing the composite time trade-off: a test of feasibility and face validity

Abstract

Introduction

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction

Methods

Results

Conclusion

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One-to-one versus group setting for conducting computer-assisted TTO studies: findings from pilot studies in England and the Netherlands

Dealing with the health state ‘dead’ when using discrete choice experiments to obtain values for EQ-5D-5L heath states

Lead versus lag-time trade-off variants: does it make any difference?

Time trade-off: one methodology, different methods

The effects of lead time and visual aids in TTO valuation: a study of the EQ-VT framework

Time to tweak the TTO: results from a comparison of alternative specifications of the TTO