Annexes 1 and 2 capture a full set of EQ-5D population norm tables that were estimated for each country. The tables contain information on the size of the study, EQ VAS ratings and proportion of reported problems on each of the EQ-5D dimensions, as well as EQ-5D index values.Annex 1 includes surveys that were based on national representative populations. The survey for England is included among the national surveys, as it is expected to be referenced more widely in studies performed in the United Kingdom. Annex 2 includes surveys that were based on general populations but were limited to specific regions of the particular country. There are three examples where both national and regional surveys are available in a single country, including Spain, Sweden, and the United Kingdom. The choice between using the national versus the regional dataset as a reference group may well depend on the objectives and audiences of future studies. It is important to note that in all of these three countries, the regional surveys were conducted more recently. Both the survey for England and the Stockholm county survey capture a large proportion of the population in England and Sweden. The results of the English survey were similar to the UK survey, conducted 17 years previously, however no EQ VAS data were collected in the English survey. The new Stockholm county survey results show consistently worse EQ-5D population norms in all EQ-5D variables and in all age

No abstract

IntroductionThis 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.MethodsThe 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.ResultsA 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.ConclusionFace 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.