Table 1 Major Characteristics of Five Generic Preference-Based Multi-Attribute Systems
Instrument | QWB | HUI | EQ-5D | SF-6D | |
|---|---|---|---|---|---|
| Â | Â | HUI2 | HUI3 | Â | Â |
Developed | 1970s | 1980s | 1990s | 1990s | 1990s |
# Attributes (# levels per attribute) | 4 (3 to 27) | 7 (3 to 5) | 8 (5 or 6) | 5 (3) | 6* (4 to 6) |
# of unique health states | 1215 | 24000 | 972000 | 243 | 18000 |
Attributes | Mobility, Physical activity, Social activity, Symptoms / problems. | Sensation, Mobility, Emotion, Cognition, Self-care, Pain, Fertility. | Vision, Hearing, Speech, Ambulation, Dexterity, Emotion, Cognition, Pain. | Mobility, Self-care, Usual activities, Pain / discomfort, Anxiety / depression. | Physical functioning, Role limitations, Social functioning, Pain, Mental health, Vitality. |
Types of HRQL scores and measurement | Values; VAS | Utilities; VAS and SG combination | Utilities; VAS and SG combination | Values; TTO | Utilities; SG |
HRQL scoring model form | Linear additive | Multiplicative | Multiplicative | Modified linear additive | Modified linear additive |
HRQL scale interval | 0.00 to 1.00 | -0.03 to 1.00 | -0.36 to 1.00 | -0.59 to 1.00 | 0.00 to 1.00 |
Questionnaire formats (languages) | 2 (numerous) | 16 (numerous) | 1 (numerous) | 2 SF-36 versions (numerous) | |