Rescaling quality of life values from discrete choice experiments for use as QALYs: a cautionary tale

Table 2 Best-worst scaling (BWS), discrete choice experiment (DCE) and rescaled BWS (rBWS) estimates

State		BWS	DCE	rBWS
Death state		-	-0.993	0
'No capabilities state' (11111)		0	-	0.158
'Some capabilities state' (22222)		0.556	2.942	0.626
Attribute	Level*
Attachment	4	0.254	1.731	0.245
	3	0.233	0.931	0.227
	2	0.134	1.313	0.144
	1	-0.013	-	0.021
Security	4	0.179	0.264	0.182
	3	0.107	0.479	0.122
	2	0.066	0.143	0.087
	1	0.032	-	0.059
Role	4	0.192	0.472	0.193
	3	0.179	0.551	0.183
	2	0.130	0.385	0.141
	1	0.015	-	0.044
Enjoyment	4	0.166	0.419	0.171
	3	0.164	0.619	0.170
	2	0.119	0.453	0.131
	1	0.017	-	0.046
Control	4	0.209	1.631	0.208
	3	0.185	1.137	0.187
	2	0.108	0.648	0.122
	1	-0.051	-	-0.012

* Numbers refer to levels from most attractive (4) to least attractive (1) and correspond to level wording given in Table 1

ISSN: 1478-7954