Assessment of Quality of Life – 8 Dimension (AQoL-8D)
A multi-attribute utility instrument designed to assess health-related quality of life across multiple dimensions.
Scale Development & Technical Details
Scale Overview
The Assessment of Quality of Life – 8 Dimension (AQoL-8D) was developed by Jeff Richardson, Angelo Iezzi, Aistrope, M. A. (2014). It is designed to measure Health-Related Quality of Life. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 29 items organized into 6 factors/subscales: Independent Living, Life Satisfaction, Mental Health, Coping, Relationships, Self-Worth.
| Factor / Subscale | Items | N |
|---|---|---|
| Independent Living | 1,2,3,4 | 4 |
| Life Satisfaction | 5,6,7,8 | 4 |
| Mental Health | 9,10,11,12,13,14,15,16 | 8 |
| Coping | 17,18,19 | 3 |
| Relationships | 20,21,22,23,24,25,26 | 7 |
| Self-Worth | 27,28,29 | 3 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 1 = Level 1 (Most favorable/No difficulty), 2 = Level 2, 3 = Level 3, 4 = Level 4, 5 = Level 5, 6 = Level 6 (Least favorable/Severe difficulty).
The scale includes 11 reverse-scored items to reduce acquiescence bias.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 0 to 1. Interpretation guidelines:
- Utility score range (0.00 representing death equivalent, 1.00 representing full health): 0 – 1
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Alpha values for subscales range from 0.70 to 0.90.
Administration
The scale is self-administered and typically takes approximately 8 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.