Table 1.

Comparison of the dimensions of the EQ-5D-5L and AQoL-8D multi-attribute utility instruments

Characteristics	EQ-5D-5L	AQoL-8D
Number of health states described	3125	2.4 × 1023
Total number of dimensions	Five dimensions, 1 item in each. Each item has 5 levels of severity scored as 1 (best) to 5 (worst)	Eight dimensions of between 3 and 8 items; 35 items in total. 25 of the 35 items capture and assess psychosocial domains of health.
Number of dimensions of physical health	Four dimensions: mobility, self-care, usual activities, and pain/discomfort	Three dimensions: (1) Independent Living, 4 items (household tasks, getting around, mobility, self-care); (2) Senses, 3 items (vision, hearing, communication); and (3) Pain, 3 items (frequency of pain, degree of pain, pain interference)
Number of dimensions of psychosocial health	One dimension: anxiety/depression with five levels of severity: (1) I am not anxious or depressed (2) I am slightly anxious or depressed (3) I am moderately anxious or depressed (4) I am severely anxious or depressed (5) I am extremely anxious or depressed	Five dimensions: (4) Happiness, 4 items (contentment, enthusiasm, degree of feeling happiness, pleasure); (5) Coping, 3 items (energy, being in control, coping with problems); (6) Relationships, 7 items (relationship with family and friends, social isolation, social exclusion, intimate relationship, family role and community role); (7) Self-worth, 3 items (feeling like a burden, worthlessness, confidence); (8) Mental Health, 8 items (feelings of depression, trouble sleeping, feelings of anger, self-harm, feeling despair, worry, sadness, tranquillity/agitation)
Super dimensions of physical and psychosocial health	No super dimensions	Two super dimensions: Physical super dimension (PSD) and Psychosocial super dimension (MSD). PSD includes independent living, senses, and pain; MSD includes happiness, coping, relationships, self-worth, and mental health