Construction of Descriptive System
- Richardson J, Peacock S, Hawthorne G, Iezzi A, Elsworth G & Atherton Day N. (2012). 'Construction of the descriptive system for the assessment of quality of life AQoL-6D utility instrument'. Health and Quality of Life Outcomes, 10(38). doi:10.1186/1477-7525-10-38
Construction of Utility Weights
- Richardson J, Atherton Day N, Peacock S, & Iezzi A. (2004). 'Measurement of the Quality of Life for Economic Evaluation and the Assessment of Quality of Life (AQoL) Mark 2 Instrument'. Australian Economic Review, 37: 62–88. doi: 10.1111/j.1467-8462.2004.00308.x
Validity, Reliabilty, Transformations
- Richardson J. 2010. Psychometric Validity and Multi Attribute Utility (MAU) Instruments, Research Paper 57, Centre for Health Economics, Monash University, Melbourne.
- Test-retest reliabilty coefficients - page 36 in Richardson J, Chen, G, Iezzi, A & Khan, M. (2011). Transformations between the Assessment of Quality of Life AQoL Instruments and Test-Retest Reliability. Centre for Health Economics, Monash University, Melbourne.
- Maxwell, A, Özmen, M, Iezzi, A, & Richardson, JR (2016). Deriving population norms for the AQoL-6D and AQoL-8D multi attribute utility instruments from web-based data. Quality of Life Research. DOI 10.1007/s11136-016-1337-z
- WHO concept of Handicap.
- 6 separately scored dimensions, with variable item numbers and response levels.
- A simple global ‘utility’ score
- Increased sensitivity in the range of good health
- Independent Living - household tasks, mobility outside the home, walking and self-care;
- Relationships - friendships, family and community role;
- Mental Health - feelings of despair, worry, sadness, tranquility/agitation;
- Coping - covering having enough energy, being in control and coping with problems;
- Pain - the frequency of pain, the degree of pain and the interference with usual activities caused by pain;
- Senses - seeing, hearing and communication.
- Structural Equation Modelling of the construction item bank completed by a representative sample of 316 members of the public across SEIFA groups and
312 hospital patients.
- Items were collected as for AQoL-4D.
- TTO and PTO interviews were done with 361 randomly selected members of the public across SEIFA groups to determine utility weights for items, dimensions and AQoL “all worst”
- Multiplicative models to combine items into dimensions
- Multiplicative model to combine dimensions into a ‘stage 1’ single index.
- Econometric analysis to correct stage 1 estimates to produce a stage 2 index.
- AQoL-6D takes about 2-3 minutes to complete.
- J Richardson (team leader), N Day, G Hawthorne, S Peacock, A Iezzi