AQoL-8D
AQoL-8D questionnaire
Scoring the AQol-8D
Diagram of the AQoL-8D structure
AQoL-8D reliability
Reference papers:
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
Richardson, JR, Iezzi, A, Khan, MA, & Maxwell, A. (2014). Validity and Reliability of the Assessment of Quality of Life (AQoL)-8D Multi-Attribute Utility Instrument. The Patient - Patient Centered Outcomes Research, vol 7, pp 85-96. DOI 10.1007/s40271-013-0036-x
Construction of Descriptive System
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61 - Richardson, J, Elsworth, G, Iezzi, A, Khan, MA, Mihalopoulos, C, Schweitzer, I, Herrman, H. (2011). Increasing the sensitivity of the AQoL inventory for the evaluation of interventions affecting mental health. Centre for Health Economics, Monash University, Melbourne.
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40 - Richardson J, Iezzi A, Khan MA, Sinha K, Mihalopoulos C, Herrman H, Hawthorne G, Schweitzer I. (2009). Data used in the development of the AQoL-8D (PsyQoL) Quality of Life Instrument, Centre for Health Economics, Monash University, Melbourne.
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39 - Richardson J, Khan MA, Iezzi A, Sinha K, Mihalopoulos C, Herrman H, Hawthorne G, Schweitzer I. (2009). The AQoL-8D (PsyQoL) MAU Instrument: Overview September 2009. Centre for Health Economics, Monash University, Melbourne.
Construction of Utility Weights
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Richardson J., Sinha K., Iezzi A., & Khan M.A. (2014). Modelling utility weights for the Assessment of Quality of Life (AQoL) 8D. Quality of Life Research, vol 23, pp2395-2404. DOI:10.1007/s11136-014-0686-8. [An earlier draft of this paper can be accessed here.]
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40 - Richardson J, Iezzi A, Khan MA, Sinha K, Mihalopoulos C, Herrman H, Hawthorne G, Schweitzer I. (2009). Data used in the development of the AQoL-8D (PsyQoL) Quality of Life Instrument, Centre for Health Economics, Monash University, Melbourne.
Validity and Reliability
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Richardson J, Khan MA, Iezzi A, Maxwell A. (2015). Measuring the sensitivity and construct validity of 6 utility instruments in 7 disease areas. Medical Decision Making, e-copy ahead of print DOI: 10.1177/0272989X15613522.
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Richardson J, Chen G, Khan MA, Iezzi A. (2015). Can multi attribute utility instruments adequately account for subjective well-being? Medical Decision Making, vol 35, no 3 pp 292-304.
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Richardson J, Khan MA, Iezzi A, Maxwell A. (2014). Comparing and explaining differences in the content, sensitivity and magnitude of incremental utilities predicted by the EQ-5D, SF-6D, HUI 3, 15D, QWB and AQoL-8D multi attribute utility instruments. Medical Decision Making (accepted 15 June 2014) DOI: 10.1177/0272989X14543107.
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Richardson J, Iezzi A, Khan MA, Maxwell A. (2014). Validity and reliability of the Assessment of Quality of Life (AQoL-8D) multi attribute utility instrument. The Patient: Patient-Centered Outcomes Research, vol 7, pp 85-96 (DOI 10.1007/s40271-013-0036-x).
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63 - Richardson J, Sinha K, Iezzi A, Khan MA. (2011). Modelling the Utility of Health States with the Assessment of Quality of Life (AQoL) 8D Instrument: Overview and Utility Scoring Algorithm. Centre for Health Economics, Monash University, Melbourne.
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47 - Richardson J, Khan MA, Iezzi A. (2010). Preliminary results for the validation of the Assessment of Quality of Life AQoL-8D instrument, Centre for Health Economics, Monash University, Melbourne.
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Richardson J. 2010. Psychometric Validity and Multi Attribute Utility (MAU) Instruments, Research Paper 57, Centre for Health Economics, Monash University, Melbourne.
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Test-retest reliabilty coefficients - page 38 in Richardson J, Chen, G, Iezzi, A & Khan, MA. (2011). Transformations between the Assessment of Quality of Life AQoL Instruments and Test-Retest Reliability. Centre for Health Economics, Monash University, Melbourne.
Transformations
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66 - Richardson J, Chen, G, Iezzi, A & Khan, MA. (2011). Transformations between the Assessment of Quality of Life AQoL Instruments and Test-Retest Reliability. Centre for Health Economics, Monash University, Melbourne.
Norms
Conceptualisation: WHO concept of Handicap
Timing:
AQoL- 8D takes about 5 minutes to complete
Description:
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8 separately scored dimensions, consisting of AQoL-6D and 2 additional dimensions, totalling 35 items
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Items were developed from other mental health scales and focus groups
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A simple global ‘utility’ score
Dimensions from AQoL-6D
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Independent Living - household tasks, mobility outside the home, walking and self-care;
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Relationships - friendships, family role and community role;
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Mental Health - feelings of despair, worry, sadness, tranquility/agitation;
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Coping - having enough energy, being in control and coping with problems;
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Pain - the frequency of pain, the degree of pain and the interference with usual activities caused by pain;
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Senses - seeing, hearing and communication.
New 8D Dimensions and/or New Items added to the 6D Dimensions
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Relationships - enjoying relationships with family and friends, satisfaction with close relationships with family and friends, social isolation and social exclusion;
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Mental Health - feelings of depression, trouble sleeping, feelings of anger, self-harm;
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Self-Worth - feeling like a burden, worthlessness and confidence;
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Happiness - contentment, enthusiam, degree of feeling happiness and pleasure.
Super-dimension components
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Physical - independent living, senses, pain
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Psychosocial - mental health, relationships, coping, self-worth, happiness
Construction
Descriptive System:
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Exploratory Factor Analysis and Structural Equation Modelling of item responses from a representative sample of members of the public (n=200) and mental health patients at various Melbourne mental health centres (n=470)
Scaling System:
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TTO scores were obtained from 300 patients and 300 members of the public
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Multiplicative stage 1 dimension models were constructed
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Econometric “correctional” stage 2 dimension models were constructed
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A multiplicative global model combined the 8 dimensions
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An econometric ‘corrected’ stage 2 model was constructed
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