A comparison of health utility scores calculated using United Kingdom and Canadian preference weights in persons with alzheimer’s disease and their caregivers

Table 4 Median EQ-5D-3L health utility scores stratified by disease severity

	Severity	UK-based preference weights (95 % CI)	Canadian-based preference weights (95 % CI)
Persons with AD	Mild (n = 173)	0.85 (0.85,0.88)^a	0.84 (0.84,0.84)^a
Persons with AD	Moderate (n = 40)	0.81 (0.73,0.88)^b	0.82 (0.74,0.84)^b
Caregivers	Mild (n = 175)	0.81 (0.80,0.85)^c	0.83 (0.83,0.83)^c
Caregivers	Moderate (n = 41)	0.80 (0.80,0.80)^d	0.83 (0.80,0.84)^d

Note. AD Alzheimer’s disease, CI confidence interval, UK United Kingdom, Health utility scores were not calculated for three persons with AD who did not answer all of the EQ-5D-3L questions
^a p = 0.59 for median difference in persons with AD within mild stratum
^b p = 0.98 for median difference in persons with AD within moderate stratum
^c p < 0.0001 for median difference in caregivers within mild stratum
^d p = 0.009 for median difference in caregivers within moderate stratum

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