HUG/HUI Logo HEALTH  UTILITIES  INDEX:

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.

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-Health 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 xn is the attribute level and bn 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.



HUG/HUIHealth Related Quality of Life Research
HUG / HUI "HUI2 Classification" updated - April 7, 2003
HUG Webpages designed and maintained by John R. Horsman, CE&B