Health Utilities Inc. "HUI2"

HUInc Health-Related Quality of Life Research

HEALTH UTILITIES INC

Multi-Attribute Health Status Classification System:
Health Utilities Index Mark 2 (HUI2)

Attribute	Level	Description
SENSATION	1	Able to see, hear, and speak normally for age.
	2	Requires equipment to see or hear or speak.
	3	Sees, hears, or speaks with limitations even with equipment.
	4	Blind, deaf, or mute.

MOBILITY	1	Able to walk, bend, lift, jump, and run normally for age.
	2	Walks, bends, lifts, jumps, or runs with some limitations but does not require help.
	3	Requires mechanical equipment (such as canes, crutches, braces, or wheelchair) to walk or get around independently.
	4	Requires the help of another person to walk or get around and requires mechanical equipment as well.
	5	Unable to control or use arms and legs.

EMOTION	1	Generally happy and free from worry.
	2	Occasionally fretful, angry, irritable, anxious, depressed, or suffering "night terrors".
	3	Often fretful, angry, irritable, anxious, depressed, or suffering "night terrors".
	4	Almost always fretful, angry, irritable, anxious, depressed.
	5	Extremely fretful, angry, irritable, anxious, or depressed usually requiring hospitalization or psychiatric institutional care.

COGNITIVE	1	Learns and remembers school work normally for age.
	2	Learns and remembers school work more slowly than classmates as judged by parents and/or teachers.
	3	Learns and remembers very slowly and usually requires special educational assistance.
	4	Unable to learn and remember.

SELF-CARE	1	Eats, bathes, dresses, and uses the toilet normally for age
	2	Eats, bathes, dresses, or uses the toilet independently with difficulty.
	3	Requires mechanical equipment to eat, bathe, dress, or use the toilet independently.
	4	Requires the help of another person to eat, bathe, dress, or use the toilet.

PAIN	1	Free of pain and discomfort.
	2	Occasional pain. Discomfort relieved by non-prescription drugs or self-control activity without disruption of normal activities.
	3	Frequent pain. Discomfort relieved by oral medicines with occasional disruption of normal activities.
	4	Frequent pain; frequent disruption of normal activities. Discomfort requires prescription narcotics for relief.
	5	Severe pain. Pain not relieved by drugs and constantly disrupts normal activities.

FERTILITY	1	Able to have children with a fertile spouse.
	2	Difficulty in having children with a fertile spouse.
	3	Unable to have children with a fertile spouse.

  NOTE:  The above level descriptions are worded here
                 exactly as they were presented to interview
                 subjects in the HUI2 preference survey.

For a pdf-formatted version of the HUI2 and HUI3 Classification Systems click here.

HUI2 Single-Attribute Utility Functions^*

Level	Sensation	Mobility	Emotion	Cognition	Self-Care	Pain	Fertility
1	1.00	1.00	1.00	1.00	1.00	1.00	1.00
2	0.87	0.92	0.86	0.86	0.85	0.95	0.75
3	0.65	0.61	0.60	0.66	0.55	0.75	0.00
4	0.00	0.34	0.37	0.00	0.00	0.42
5		0.00	0.00			0.00

*Torrance et al. Medical Care 1996, Table 7, page 715.

HUI2 Multi-Attribute Utility Function^*
on Dead-Healthy Scale

Sensation x1 b1	Mobility x2 b2	Emotion x3 b3	Cognition x4 b4	Self-Care x5 b5	Pain x6 b6	Fertility x7 b7
1 1.00	1 1.00	1 1.00	1 1.00	1 1.00	1 1.00	1 1.00
2 0.95	2 0.97	2 0.93	2 0.95	2 0.97	2 0.97	2 0.97
3 0.86	3 0.84	3 0.81	3 0.88	3 0.91	3 0.85	3 0.88
4 0.61	4 0.73	4 0.70	4 0.65	4 0.80	4 0.64
	5 0.58	5 0.53			5 0.38

*Torrance et al. Medical Care 1996, Table 8, page 716.
Where x_n is the attribute level and b_n is the attribute utility score

Formula (Dead - Perfect Health scale) u* = 1.06 (b1 * b2 * b3 * b4 * b5 * b6 * b7) - 0.06

where u* is the utility of a chronic health state on a utility scale where dead has a utility of 0.00 and healthy has a utility of 1.00. Because the worst possible health state was judged by respondents as worse than death, it has a negative utility of -0.03. The standard error of u* is 0.015 for measurement error and sampling error, and 0.06 if model error is also included.

Sources
Feeny, David, William Furlong, Michael Boyle, and George W. Torrance, "Multi-Attribute Health Status Classification Systems: Health Utilities Index." PharmacoEconomics, Vol 7, No 6, June, 1995, pp 490-502.

Feeny, David H., George W. Torrance, and William J. Furlong, "Health Utilities Index," Chapter 26 In Bert Spilker, ed. Quality of Life and Pharmacoeconomics in Clinical Trials. Second Edition. Philadelphia: Lippincott-Raven Press, 1996, pp 239-252.

Torrance, George W., David H. Feeny, William J. Furlong, Ronald D. Barr, Yueming Zhang, and Qinan Wang, "Multi-Attribute Preference Functions for A Comprehensive Health Status Classification System: Health Utilities Index Mark 2." Medical Care, Vol. 34, No. 7, July 1996, pp 702-722.

For information on the HUI2 valuation in the United Kingdom follow the following link C.McCabe at University of Sheffield
Follow the links for detailed information on the HUI3 classification system;
Selecting a Self- or Interviewer- or Web-based administration format;
Reviewing the Table of Contents/Introduction of the HUI Self-Complete Questionnaire manual;
Completing the on-line Application Form to contact the HUI Service Centre
with your study-particulars and allow your HUInc representative help you
choose the HUI instrument that meets your needs.

HUInc^{Leaders in the Utility Assessment of Health-Related Quality of Life}
(R) HUI Registration: USA 2660116, 2716082; UK 2228611, 2228610; CAN TMA544008, TMA550246.