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Can we really measure animal quality of life? Methodologies for measuring quality of life in people and other animals

Published online by Cambridge University Press:  11 January 2023

EM Scott ,
AM Nolan ,
J Reid  and
ML Wiseman-Orr
EM Scott*
Affiliation:
Department of Statistics, University of Glasgow, Glasgow G12 8QW, UK
AM Nolan
Affiliation:
Institute of Comparative Medicine, Faculty of Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
J Reid
Affiliation:
Institute of Comparative Medicine, Faculty of Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
ML Wiseman-Orr
Affiliation:
Institute of Comparative Medicine, Faculty of Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
*
* Correspondence: [email protected]
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Abstract

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Quality of life (QoL) is an abstract construct that has been formally recognised and widely used in human medicine. In recent years, QoL has received increasing attention in animal and veterinary sciences, and the measurement of QoL has been a focus of research in both the human and animal fields. Lord Kelvin said “When you cannot measure it, when you cannot express it in numbers — you have scarcely in your thoughts, advanced to a stage of science, whatever the matter may be” (Lord Kelvin 1893). So are we able to measure animal QoL? The psychometric measurement principles for abstract constructs such as human intelligence have been well rehearsed and researched. Application of traditional and newer psychometric approaches is becoming more widespread as a result of increasing human and animal welfare expectations which have brought a greater emphasis on the individual. In recent decades the field of human medicine has developed valid measures of experienced pain and QoL of individuals, including those who are not capable of self-report. More recently, researchers who are interested in the measurement of animal pain and QoL have begun to use similar methodologies. In this paper, we will consider these methodologies and the opportunities and difficulties they present.

Keywords

animal quality of lifeanimal welfaredogmeasurementpsychometricstatistical methods
Type
Research Article
Information
Animal Welfare , Volume 16 , Issue S1: Quality of Life: the heart of the matter: Proceedings of the UFAW/BVA Ethics Committee International Symposium, The Royal Society, London, 13-14 September 2006. , May 2007 , pp. 17 - 24
Copyright
© 2007 Universities Federation for Animal Welfare

References

Abu-Saad, HH 2001 Commentary. Archives of Disease in Childhood — Fetal and Neonatal Edition 85: F40–F41Google Scholar
Anand, KJS and Craig, KD 1996 New perspectives on the definition of pain. Pain 67: 3–6Google Scholar
Birnbacher, D 1999 Quality of life — evaluation or description? Ethical Theory and Moral Practice 2: 25–36CrossRefGoogle ScholarPubMed
Bowling, A 1991 Measuring Health: A Review of Quality of Life Measurement. Open University Press: Buckingham, UKGoogle Scholar
Burghardt, GM 1985 Foundations of Comparative Ethology. Van Nostrand Reinhold: New York, USAGoogle Scholar
Burghardt, GM 1991 Cognitive ethology and critical anthropomorphism: a snake with two heads and hognose snakes that play dead. In: Ristau, CA (ed) Cognitive Ethology: The Minds of Other Animals pp 53–90. Erlbaum: San Francisco, USAGoogle Scholar
Cicchetti, DV, Showalter, D and Tyrer, PJ 1985 The effect of number of rating scale categories on levels of interrater reliability: a Monte Carlo investigation. Applied Psychological Measurement 9: 31–36CrossRefGoogle Scholar
Cook, KF, Monahan, PO and McHorney, CA 2003 Delicate balance between theory and practice: health status and item response theory (Editorial). Medical Care 41: 571–574CrossRefGoogle Scholar
Coste, J, Fermanian, J and Venot, A 1995 Methodological and statistical problems in the construction of composite measurement scales: a survey of six medical and epidemiological journals. Statistics in Medicine 14: 331–345CrossRefGoogle Scholar
Cunningham, N 1999 Primary requirements for an ethical definition of pain (Focus). Pain Forum 8: 93–99CrossRefGoogle Scholar
Dijkers, M 1999 Measuring quality of life: methodological issues. American Journal of Physical Medicine and Rehabilitation 78: 286–300CrossRefGoogle ScholarPubMed
Eiser, C and Morse, R 2001 A review of measures of quality of life for children with chronic illness. Archives of Disease in Childhood 84: 205–211CrossRefGoogle ScholarPubMed
Embretson, SE and Reise, SP 2000 Item Response Theory for Psychologists. LEA: New Jersey, USAGoogle Scholar
Emery, M-P, Perrier, L-L and Acquadro, C 2005 Patient-Reported Outcome and Quality of Life Instruments Database (PROQOLID): Frequently asked questions. Health and Quality of Life Outcomes 3: 12CrossRefGoogle Scholar
Fallowfield, L 1990 The Quality of Life: The Missing Measurement in Health Care. Souvenir Press: London, UKGoogle Scholar
Farm Animal Welfare Council 1992 FAWC updates the five freedoms. Veterinary Record 131: 357Google Scholar
Fayers, PM and Hand, DJ 2002 Causal variables, indicator variables and measurements scales: an example from quality of life. Journal of the Royal Statistical Society 165(2): 1–21Google Scholar
Fayers, PM, Hopwood, P, Harvey, A, Girling, DJ, Machin, D and Stephens, R 1997 Quality of life assessment in clinical trials: guidelines and a checklist for protocol writers. The UK Medical Research Council experience. European Journal of Cancer 33: 20–28CrossRefGoogle Scholar
Feinstein, AR 1987 Clinimetrics pp 249–253. Yale University Press: Yale, USACrossRefGoogle Scholar
Fischer, GH and Molenaar, IW 1995 Rasch Models. Foundations, Recent Developments and Applications. Springer: Dordrecht, The NetherlandsGoogle Scholar
Freeman, LM, Rush, JE, Farabaugh, AE and Must, A 2003 Development and evaluation of a questionnaire for assessing health-related quality of life in dogs with cardiac disease. Journal of the American Veterinary Medical Association 226: 1864–1868CrossRefGoogle Scholar
Garratt, A, Schmidt, L, Mackintosh, A and Fitzpatrick, R 2002 Quality of life measurement: bibliographic study of patient assessed health outcome measures. British Medical Journal 324: 1417–1419CrossRefGoogle ScholarPubMed
Gingerich, DA and Strobel, JD 2003 Use of client-specific outcome measures to assess treatment effects in geriatric, arthritic dogs: controlled clinical evaluation of a neutraceutical. Veterinary Therapeutics 4: 376–386Google Scholar
Guyatt, G, Walter, S and Norman, G 1987 Measuring change over time: assessing the usefulness of evaluative instruments. Journal of Chronic Diseases 40: 171–178CrossRefGoogle ScholarPubMed
Guyatt, GH, Feeny, DH and Patrick, DL 1993 Measuring health-related quality of life. Annals of Internal Medicine 118: 622–629CrossRefGoogle ScholarPubMed
Hielm-Björkman, AK, Kuusela, E, Lipman, A, Markkola, A, Saarto, E, Huttunen, P, Leppäluoto, J, Tulamo, R-M and Raekallio, M 2003 Evaluation of methods for assessment of pain associated with chronic osteoarthritis in dogs. Journal of the American Veterinary Medical Association 222: 1552–1558CrossRefGoogle ScholarPubMed
Innes, A and Surr, L 2001 Measuring the well-being of people with dementia living in formal care settings: the use of Dementia Care mapping. Ageing and Mental Health 5: 258–268CrossRefGoogle ScholarPubMed
Jensen, MP 2003 Questionnaire validation: a brief guide for readers of the research literature. The Clinical Journal of Pain 19: 345–352CrossRefGoogle ScholarPubMed
Johnston, CC 1998 Psychometric issues in the measurement of pain. In: Finley GA and McGrath PJ (eds) Measurement of Pain in Infants and Children, Progress in Pain Research and Management, Volume 10 pp 5–20. IASP Press: Seattle, USAGoogle Scholar
Juniper, EF, Guyatt, GH and Jaeschke, R 1996 How to develop and validate a new health-related quality of life instrument. In: Spilker, B (ed) Quality of Life and Pharmacoeconomics in Clinical Trials (2nd Edition) pp 49–56. Lippincott-Raven: Philadelphia, USAGoogle Scholar
Kelvin 1893 Popular Lectures and Addresses, Vol 1: Electrical Units of Measurement. Lecture given to the Institute of Civil EngineersGoogle Scholar
Landgraf, JM and Abetz, LN 1996 Measuring health outcomes in pediatric populations: issues in psychometrics and application. In: Spilker, B (ed) Quality of Life and Pharmacoeconomics in Clinical Trials (2nd Edition) pp 793–802. Lippincott-Raven: Philadelphia, USAGoogle Scholar
Liang, MH, Lew, RA, Stucki, G, Fortin, PR and Daltroy, L 2002 Measuring clinically important changes with patient oriented questionnaires. Medical Care 40 (4) (Suppl II): II-45–II-51CrossRefGoogle ScholarPubMed
Matza, LS, Swensen, AR, Flood, EM, Secnik, K and Leidy, NK 2004 Assessment of health-related quality of life in children: a review of conceptual, methodological, and regulatory issues. Value in Health 7: 79–92CrossRefGoogle ScholarPubMed
McMillan, FD 2005 The concept of quality of life in animals. In: McMillan FD (ed) Mental Health and Well-Being in Animals p 193. Blackwell: Ames, Iowa, USACrossRefGoogle Scholar
Miller, GA 1956 The magical number seven, plus or minus two: some limits on our capacity for processing information. The Psychological Review 63: 81–97CrossRefGoogle ScholarPubMed
Nunnally, JC and Bernstein, IH 1994 Psychometric Theory (3rd Edition). McGraw Hill: New York, USAGoogle Scholar
Preston, CC and Coleman, AM 2000 Optimal number of response categories in rating scales: reliability, validity, discriminating power, and respondent preferences. Acta Psychologica (Amst) 104: 1–15CrossRefGoogle ScholarPubMed
Schneider, TR 2005 Methods for assessing companion animal quality of life. Iams Symposium Proceedings at the North American Veterinary Conference, Improving Our Listening Skills: What Dogs and Cats are Telling Us, Orlando, FL, USA. The Iams Company: Dayton, OH, USAGoogle Scholar
Scott, EM, Fitzpatrick, JL, Nolan, AM, Reid, J and Wiseman, ML 2003 Evaluation of welfare state based on interpretation of multiple indices. Animal Welfare 12: 257–268CrossRefGoogle Scholar
Skevington, SM 1998 Investigating the relationship between pain and discomfort and quality of life, using the WHOQOL. Pain 76: 395–406CrossRefGoogle ScholarPubMed
Skevington, SM, MacArthur, P and Somerset, M 1997 Developing items for the WHOQOL: an investigation of contemporary beliefs about quality of life related to health in Britain. British Journal of Health Psychology 2: 55–72CrossRefGoogle Scholar
Stenner, PHD, Cooper, D and Skevington, SM 2003 Putting the Q into quality of life: the identification of subjective constructions of health-related quality of life using Q methodology. Social Science and Medicine 57: 2161–2172CrossRefGoogle Scholar
Streiner, DL 1993 Research methods in psychiatry. A checklist for evaluating the usefulness of rating scales. Canadian Journal of Psychiatry 38: 140–148CrossRefGoogle Scholar
Streiner, DL and Norman, GR 1995 Health Measurement Scales: A Practical Guide to Their Development and Use (2nd Edition) pp 1–180. Oxford University Press: New York, USAGoogle Scholar
Theunissen, NCM, Vogels, TGC, Koopman, GHW, Zwinderman, KAH, Verloove-Vanhorick, SP and Wit, JM 1998 The proxy problem: child report versus parent report in health-related quality of life research. Quality of Life Research 7: 387–397CrossRefGoogle ScholarPubMed
Thurstone, LL 1927 A law of comparative judgement. Psychological Review 34: 273–386CrossRefGoogle Scholar
Wemelsfelder, F 1997 The scientific validity of subjective concepts in models of animal welfare. Applied Animal Behaviour Science 53(1-2): 75–88CrossRefGoogle Scholar
Wemelsfelder, F, Hunter, TEA, Mendl, MT and Lawrence, AB 2000 The spontaneous qualitative assessment of behavioural expressions in pigs: first explorations of a novel methodology for integrative animal welfare measurement. Applied Animal Behaviour Science 67(3): 193–215CrossRefGoogle ScholarPubMed
Wemelsfelder, F, Hunter, TEA, Mendl, MT and Lawrence, AB 2001 Assessing the ‘whole animal’: a free choice profiling approach. Animal Behaviour 62: 209–220CrossRefGoogle Scholar
WHOQOL Group 1995 The World Health Organization quality of life assessment (WHOQOL): position paper from the World Health Organization. Social Science and Medicine 41: 1403–1409CrossRefGoogle Scholar
Wiseman-Orr, ML, Nolan, AM, Reid, J and Scott, EM 2004 Development of a questionnaire to measure the effects of chronic pain on health-related quality of life in dogs. American Journal of Veterinary Research 65: 1077–1084CrossRefGoogle ScholarPubMed
Wiseman-Orr, ML, Scott, EM, Reid, J and Nolan, AM 2006 Validation of a structured questionnaire as an instrument to measure chronic pain in dogs on the basis of effects on health-related quality of life. American Journal of Veterinary Research 67: 1826–1836CrossRefGoogle ScholarPubMed
Wojciechowska, JI, Hewson, CJ, Strhynn, H, Guy, NC, Patronek, GJ and Timmons, V 2005a Development of a discriminative questionnaire to assess non-physical aspects of quality of life of dogs. American Journal of Veterinary Research 66: 1453–1460CrossRefGoogle Scholar
Wojciechowska, JI, Hewson, CJ, Strhynn, H, Guy, NC, Patronek, GJ and Timmons, V 2005b Evaluation of a questionnaire regarding non-physical aspects of quality of life in sick and healthy dogs. American Journal of Veterinary Research 66: 1461–1467CrossRefGoogle Scholar
Yazbek, KVB and Fantoni, DT 2005 Validity of health-related quality of life scale for dogs with signs of pain secondary to cancer. Journal of the American Veterinary Medical Association 226: 1354–1358CrossRefGoogle ScholarPubMed
Yen, M and Edwardson, SR 1999 Item Response Theory approach in scale development. Nursing Research 48: 234–238CrossRefGoogle ScholarPubMed