Aqol-4D

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References

Construction of Descriptive System

Construction of Utility Weights

  • Hawthorne G & Richardson J. 1997. ‘The assessment of quality of life (AQoL) instrument construction, initial validation and utility scaling’, Working Paper 76, Centre for Health Program Evaluation, Melbourne.
  • Richardson, J & Hawthorne, G. (1999). 'Difficulty with Life and Death', in Economics and Health: 1998, Proceedings of the Twentieth Australian Conference of Health Economists, ed J. Baldry, School of Health Services Management, University of New South Wales, Sydney.

Validity

  • Hawthorne G & Richardson J. 1997. ‘The assessment of quality of life (AQoL) instrument construction, initial validation and utility scaling’, Working Paper 76, Centre for Health Program Evaluation, Melbourne.
  • Hawthorne G, Richardson J and Day NA. 2001. ‘A comparison of the assessment of quality of life (AQoL) with four other generic utility instruments’, Annals of Medicine, 33(5),    pp    358-370.
  • Hawthorne G & Richardson J. (2001). 'Measuring the value of program outcomes: A review of multi attribute utility measures', Expert Review of Pharmacoeconomics and Outcome Research, 1(2), pp 215-228.
  • Richardson J. 2010. Psychometric Validity and Multi Attribute Utility (MAU) Instruments, Research Paper 57, Centre for Health Economics, Monash University,    Melbourne.
  • Richardson, J & Hawthorne, G. (1998). 'The Australian Quality of Life (AQoL) instrument: Psychometric properties of the descriptive system and initial validation', Economics and Health: 1997, Proceedings of the Nineteenth Australian Conference of Health Economists, ed A. Harris, School of Health Services Management, University of New South Wales, Sydney.

Reliability

  • Hawthorne G, Richardson J et al. 1997. The Australian Quality of Life AQoL Instrument, Working Paper 66, Centre for Health Program Evaluation, Melbourne
  • Test-retest reliabilty coefficients on page 35 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.

Norms

Comparison with other MAUI

  • Hawthorne G, Richardson J, Day NA. (2001). A comparison of the Assessment of Quality of Life (AQoL) with four other generic utility instruments. Annals of Medicine, 33, pp 358–70.
  • Hawthorne G, Richardson J. (2001). Measuring the value of program outcomes: a review of utility measures. Expert Review of Pharmacoeconomics Outcomes and Research, 1(2), pp 215-28.
  • Hawthorne G, Richardson J, Day N. (2001). A comparison of five multi-attribute utility instruments. Australian Studies of Health Services Adminstration, 89, pp 151-79.

Conceptualisation

Description

  • 4 separately scored dimensions, each with 3 items.
  • A simple global ‘utility’ score

Dimensions

  • Independent Living - self-care, household tasks and mobility;
  • Relationships - friendships, isolation and family role;
  • Mental Health- sleeping, worrying and pain.
  • Senses - seeing, hearing and communication.

Construction

Descriptive System

  • Exploratory and Confirmatory Factor Analysis of the construction item bank completed by a representative sample of 112 members of the public across SEIFA groups and 143 hospital patients.
  • Items were collected from 14 independent Qol scales, iterative consultations with clinicians, researchers and population focus groups.

Scaling System

  • TTO interviews were done with 350 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 global index

Timing

  • AQoL-4D takes about 1-2 minutes to complete.

Research team

  • J Richardson (team leader), G Hawthorne, H McNeil