An EQ-5D-5L value set for Belgium : How to value health-related quality of life?

106 p.ill.,KEY POINTS 1 -- LIST OF FIGURES 5 -- LIST OF TABLES 6 -- LIST OF ABBREVIATIONS 7 -- SCIENTIFIC REPORT 9 -- 1 INTRODUCTION 9 -- 1 1 HEALTH-RELATED QUALITY OF LIFE 9 -- 1 2 APPLICATION OF HEALTH STATE UTILITY DATA IN CLINICAL AND ECONOMIC -- EVALUATIONS 12 -- 1 3 THE EQ-5D INSTRUMENT 13 -- 1 4 STUDY OBJECTIVE 15 -- 2 METHODS 16 -- 2 1 STUDY PROTOCOL 16 -- 2 1 1 Valuation techniques 16 -- 2 1 2 EQ-VT Software 19 -- 2 1 3 Structure of the interview 19 -- 2 1 4 Target sample 20 -- 2 1 5 Number of interviewers 20 -- 2 1 6 Training and pilot tests 21 -- 2 1 7 Quality control 21 -- 2 2 SAMPLING PROCESS 21 -- 2 2 1 Inclusion and exclusion criteria 21 -- 2 2 2 Sampling procedure 22 -- 2 3 STUDY APPROVAL AND PRIVACY PROTECTION ASPECTS 31 -- 2 4 DATA COLLECTION 32 -- 2 4 1 Initial recruitment of interviewers 32 -- 2 4 2 Recruitment of respondents 32 -- 2 4 3 Data collection time frame and recruitment of new interviewers 32 -- 3 DATA ANALYSIS 37 -- 3 1 DATA PREPARATION AND REPRESENTATIVENESS 37 -- 3 1 1 Creation modelling dataset 37 -- 3 1 2 Representativeness 38 -- 3 2 MODEL CONSTRUCTION 39 -- 3 2 1 Modelling cTTO valuation 39 -- 3 2 2 Modelling DCE valuation 41 -- 3 2 3 Hybrid model 42 -- 3 2 4 Fitting of the models 43 -- 3 3 MODEL SELECTION 43 -- 3 3 1 Logical consistency 43 -- 3 3 2 Goodness of fit 43 -- 3 3 3 Predictive accuracy 44 -- 3 3 4 Theoretical considerations 45 -- 3 4 PREFERRED MODEL AND VALUE SET 46 -- 4 RESULTS: THE BELGIAN EQ-5D-5L VALUE SET 47 -- 4 1 SAMPLE CHARACTERISTICS 47 -- 4 2 DATA CHARACTERISTICS 52 -- 4 2 1 cTTO data 52 -- 4 2 2 DCE data 59 -- 4 3 MODELLING RESULTS AND SELECTION 60 -- 4 3 1 Logical consistency 60 -- 4 3 2 Goodness of fit 60 -- 4 3 3 Predictive accuracy 62 -- 4 3 4 Theoretical considerations 63 -- 4 4 VALUE SET 68 -- 4 4 1 Summary of model selection 68 -- 4 4 2 Preferred model and value set 68 -- 4 4 3 Comparison with 3L value set and value sets of other countries 72 -- 5 DISCUSSION AND CONCLUSION 75 -- 5 1 STRENGTHS AND LIMITATIONS IN THE DEVELOPMENT OF THE NEW VALUE SET 75 -- 5 2 IMPLICATIONS OF THE NEW VALUE SET 76 -- 5 3 APPLICABILITY OF THE BELGIAN EQ-5D-5L VALUE SET 77 -- 5 4 FUTURE RESEARCH AND REFLECTIONS 78 --  APPENDICES 79 -- APPENDIX 1 LIKELIHOOD FUNCTIONS IN REGRESSION ANALYSIS 79 -- APPENDIX 2 REPRESENTATIVENESS OF THE POPULATION AT REGIONAL LEVEL 82 -- APPENDIX 3 FINAL VALUE SET 85 -- REFERENCES 10