Urinary cortisol/creatinine ratio (UCC) in healthy cats
2003
Zimmer, C. | Reusch, C.E. (Universitaet Zuerich, Zuerich (Switzerland). Klinik fuer Kleintiermedizin)
In 31 healthy cats urine samples were taken to determine the cortisol/creatinine ratio (UCC) during hospitalisation and at home. The UCC of the samples, which had been taken in the clinic, was significantly higher (0-19 x 10-6, Median 3 x 10-6) than the one of the samples taken at home (0-4 x 10-6, Median 1 x 10-6). The parameter was neither influenced by the cat´s age, sex or the fact that the cat stayed inside or outside, nor by the degree of visible agitation. Assay validation achieved good results regarding precision and accuracy of the measuring of cortisol and creatinine in the urine. The study shows that stress - caused by the visit to the veterinarian - can provoke a significant increase of UCC. Therefore, the parameter should be determined only from urine samples taken at home. Furthermore, it is important to notice that cortisol metabolites are measured in varying degree with the different assays. Therefore, it is inevitable that each laboratory generates its own reference values.
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