Utility weights for the vision-related Assessment of Quality of Life (AQoL)-7D instrument

Ophthalmic Epidemiology
Jeff RichardsonJill E Keeffe

Abstract

To obtain utility weights consistent with the needs of economic evaluation for the Assessment of Quality of Life (AQoL)-7D, a generic instrument created to increase the sensitivity of the measurement of quality of life amongst people with impaired vision. Two extant instruments were combined, the Vision-related Quality of Life Index (VisQoL) and the AQoL-6D. Utilities were obtained from patients with visual impairment and from the general population using time trade-off (TTO) methodology. Dimensions were combined and an econometric adjustment used to eliminate the effects of instrument redundancy. Bias was tested by comparison of holistic TTO values with utility scores predicted from the AQoL-7D scoring formula. The AQoL-7D instrument consists of 26 items and 7 dimensions each with good psychometric properties. Their combination into a single instrument resulted in significant redundancy which was successfully eliminated. Utility formulae for both the public and patients produced bias-free estimates of the utility of holistic health states describing visual impairment. Results imply differing valuations of health states by the public and by people with impaired vision. The AQoL-7D can detect changes in health states affecting p...Continue Reading

References

Sep 3, 1999·Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation·G HawthorneR Osborne
Apr 12, 2001·The Medical Journal of Australia·J J WangS R Leeder
Jun 11, 2002·Australian and New Zealand Journal of Public Health·Catherine A McCartyHugh R Taylor
Oct 27, 2005·Investigative Ophthalmology & Visual Science·Roseanne MisajonJill Keeffe
Oct 22, 2009·Medical Decision Making : an International Journal of the Society for Medical Decision Making·Dennis G FrybackJee-Seon Kim
Apr 18, 2012·Health and Quality of Life Outcomes·Jeffrey R J RichardsonNeil A Day
Oct 1, 1986·Multivariate Behavioral Research·C J HubertyJ C Smith

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Citations

May 7, 2008·The European Journal of Health Economics : HEPAC : Health Economics in Prevention and Care·Jeff RichardsonAngelo Iezzi
Jun 28, 2016·Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation·Aimee MaxwellJeff Richardson
Jul 26, 2015·Medical Decision Making : an International Journal of the Society for Medical Decision Making·Lidia EngelDavid G T Whitehurst
Aug 31, 2016·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Gang ChenJeff Richardson
May 1, 2013·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Vijaya K Gothwal, Deepak K Bagga
May 1, 2021·International Journal of Environmental Research and Public Health·Moustapha TouréThomas G Poder

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