Risk factors for feline hyperthyroidism in the UK
Version of Record online: 4 AUG 2009
© 2009 British Small Animal Veterinary Association
Journal of Small Animal Practice
Volume 50, Issue 8, pages 406–414, August 2009
How to Cite
Wakeling, J., Everard, A., Brodbelt, D., Elliott, J. and Syme, H. (2009), Risk factors for feline hyperthyroidism in the UK. Journal of Small Animal Practice, 50: 406–414. doi: 10.1111/j.1748-5827.2009.00756.x
- Issue online: 4 AUG 2009
- Version of Record online: 4 AUG 2009
- Accepted: 23 February 2009
Objectives: Previous studies of cats in the USA and New Zealand have identified a number of risk factors for the development of hyperthyroidism including feeding of canned cat food and being non-purebred. The objective of this study was to examine these and other risk factors in cats from London, UK.
Methods: A questionnaire-based case-control study of hyperthyroidism in cats greater than eight years of age was undertaken. Cases and controls were recruited from two groups of first opinion clinics in London, UK (five locations in total). The two-page questionnaire investigated details of lifestyle, diet and exposure to environmental chemicals. Data analysis included multivariable analysis of risk factors using binary logistic regression.
Results: One hundred and nine hyperthyroid cats and 196 control cats were surveyed. Increasing age, non-pure breed, use of a litter box, more than 50 per cent wet food in the diet, a diet that included fish and exposure to food in a can were identified as risk factors for the development of hyperthyroidism using multivariable analysis.
Clinical Significance: Risk factors for hyperthyroidism in cats from the UK appear similar to those of other countries. Exposure to food packaged in a can was identified as the major risk factor for the development of hyperthyroidism.