Urinary corticoid to creatinine ratios using IMMULITE 2000 XPi for diagnosis of canine hypercortisolism

The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference interval was established for UCCR using IMMULITE 2000 XPi, the latest chemiluminescence enzyme immunoassay. The diagnostic performance of thi...

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Published inJournal of Veterinary Medical Science Vol. 84; no. 7; pp. 954 - 959
Main Authors SAWAMURA, Hiryu, HOSOYA, Kenji, TAKIGUCHI, Mitsuyoshi, YOKOYAMA, Nozomu, NAKAMURA, Kensuke, SASAOKA, Kazuyoshi, SASAKI, Noboru, MORISHITA, Keitaro, NAGATA, Noriyuki, IKENAKA, Yoshinori
Format Journal Article
LanguageEnglish
Published Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 2022
The Japanese Society of Veterinary Science
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ISSN0916-7250
1347-7439
1347-7439
DOI10.1292/jvms.22-0131

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Abstract The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference interval was established for UCCR using IMMULITE 2000 XPi, the latest chemiluminescence enzyme immunoassay. The diagnostic performance of this method for UCCR in canine HC was also evaluated. The median UCCR was 1.06 × 10−5 (range: 0.28–2.49) for 58 healthy dogs, and an upper reference limit of 1.98 × 10−5 (90% confidence interval: 1.76–2.15) was determined. The median UCCR in the 12 dogs with HC (7.38 × 10−5, range 1.86–29.98) was significantly higher than that in the 16 dogs with mimic-HC (1.59 × 10−5, range 0.47–3.42, P<0.001). The area under the curve for UCCR to differentiate HC dogs from mimic-HC dogs was 0.971, with a sensitivity of 91.7% and specificity of 100% when the cut-off value was set at 3.77 × 10−5. The UCCR of 16 paired urine samples collected at home and in hospital showed that the UCCR of samples collected in the hospital was significantly higher than that of samples collected at home (mean difference 3.30 × 10−5, 95% confidence interval: 0.70–5.90, P=0.001). In summary, we established the upper reference limit for UCCR using IMMULITE 2000 XPi in dogs and confirmed that UCCR is a useful diagnostic test for HC in dogs if urine samples are collected at home.
AbstractList The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference interval was established for UCCR using IMMULITE 2000 XPi, the latest chemiluminescence enzyme immunoassay. The diagnostic performance of this method for UCCR in canine HC was also evaluated. The median UCCR was 1.06 × 10-5 (range: 0.28-2.49) for 58 healthy dogs, and an upper reference limit of 1.98 × 10-5 (90% confidence interval: 1.76-2.15) was determined. The median UCCR in the 12 dogs with HC (7.38 × 10-5, range 1.86-29.98) was significantly higher than that in the 16 dogs with mimic-HC (1.59 × 10-5, range 0.47-3.42, P<0.001). The area under the curve for UCCR to differentiate HC dogs from mimic-HC dogs was 0.971, with a sensitivity of 91.7% and specificity of 100% when the cut-off value was set at 3.77 × 10-5. The UCCR of 16 paired urine samples collected at home and in hospital showed that the UCCR of samples collected in the hospital was significantly higher than that of samples collected at home (mean difference 3.30 × 10-5, 95% confidence interval: 0.70-5.90, P=0.001). In summary, we established the upper reference limit for UCCR using IMMULITE 2000 XPi in dogs and confirmed that UCCR is a useful diagnostic test for HC in dogs if urine samples are collected at home.The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference interval was established for UCCR using IMMULITE 2000 XPi, the latest chemiluminescence enzyme immunoassay. The diagnostic performance of this method for UCCR in canine HC was also evaluated. The median UCCR was 1.06 × 10-5 (range: 0.28-2.49) for 58 healthy dogs, and an upper reference limit of 1.98 × 10-5 (90% confidence interval: 1.76-2.15) was determined. The median UCCR in the 12 dogs with HC (7.38 × 10-5, range 1.86-29.98) was significantly higher than that in the 16 dogs with mimic-HC (1.59 × 10-5, range 0.47-3.42, P<0.001). The area under the curve for UCCR to differentiate HC dogs from mimic-HC dogs was 0.971, with a sensitivity of 91.7% and specificity of 100% when the cut-off value was set at 3.77 × 10-5. The UCCR of 16 paired urine samples collected at home and in hospital showed that the UCCR of samples collected in the hospital was significantly higher than that of samples collected at home (mean difference 3.30 × 10-5, 95% confidence interval: 0.70-5.90, P=0.001). In summary, we established the upper reference limit for UCCR using IMMULITE 2000 XPi in dogs and confirmed that UCCR is a useful diagnostic test for HC in dogs if urine samples are collected at home.
The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference interval was established for UCCR using IMMULITE 2000 XPi, the latest chemiluminescence enzyme immunoassay. The diagnostic performance of this method for UCCR in canine HC was also evaluated. The median UCCR was 1.06 × 10 −5 (range: 0.28–2.49) for 58 healthy dogs, and an upper reference limit of 1.98 × 10 −5 (90% confidence interval: 1.76–2.15) was determined. The median UCCR in the 12 dogs with HC (7.38 × 10 −5 , range 1.86–29.98) was significantly higher than that in the 16 dogs with mimic-HC (1.59 × 10 −5 , range 0.47–3.42, P <0.001). The area under the curve for UCCR to differentiate HC dogs from mimic-HC dogs was 0.971, with a sensitivity of 91.7% and specificity of 100% when the cut-off value was set at 3.77 × 10 −5 . The UCCR of 16 paired urine samples collected at home and in hospital showed that the UCCR of samples collected in the hospital was significantly higher than that of samples collected at home (mean difference 3.30 × 10 −5 , 95% confidence interval: 0.70–5.90, P =0.001). In summary, we established the upper reference limit for UCCR using IMMULITE 2000 XPi in dogs and confirmed that UCCR is a useful diagnostic test for HC in dogs if urine samples are collected at home.
The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference interval was established for UCCR using IMMULITE 2000 XPi, the latest chemiluminescence enzyme immunoassay. The diagnostic performance of this method for UCCR in canine HC was also evaluated. The median UCCR was 1.06 × 10 (range: 0.28-2.49) for 58 healthy dogs, and an upper reference limit of 1.98 × 10 (90% confidence interval: 1.76-2.15) was determined. The median UCCR in the 12 dogs with HC (7.38 × 10 , range 1.86-29.98) was significantly higher than that in the 16 dogs with mimic-HC (1.59 × 10 , range 0.47-3.42, P<0.001). The area under the curve for UCCR to differentiate HC dogs from mimic-HC dogs was 0.971, with a sensitivity of 91.7% and specificity of 100% when the cut-off value was set at 3.77 × 10 . The UCCR of 16 paired urine samples collected at home and in hospital showed that the UCCR of samples collected in the hospital was significantly higher than that of samples collected at home (mean difference 3.30 × 10 , 95% confidence interval: 0.70-5.90, P=0.001). In summary, we established the upper reference limit for UCCR using IMMULITE 2000 XPi in dogs and confirmed that UCCR is a useful diagnostic test for HC in dogs if urine samples are collected at home.
The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference interval was established for UCCR using IMMULITE 2000 XPi, the latest chemiluminescence enzyme immunoassay. The diagnostic performance of this method for UCCR in canine HC was also evaluated. The median UCCR was 1.06 × 10−5 (range: 0.28–2.49) for 58 healthy dogs, and an upper reference limit of 1.98 × 10−5 (90% confidence interval: 1.76–2.15) was determined. The median UCCR in the 12 dogs with HC (7.38 × 10−5, range 1.86–29.98) was significantly higher than that in the 16 dogs with mimic-HC (1.59 × 10−5, range 0.47–3.42, P<0.001). The area under the curve for UCCR to differentiate HC dogs from mimic-HC dogs was 0.971, with a sensitivity of 91.7% and specificity of 100% when the cut-off value was set at 3.77 × 10−5. The UCCR of 16 paired urine samples collected at home and in hospital showed that the UCCR of samples collected in the hospital was significantly higher than that of samples collected at home (mean difference 3.30 × 10−5, 95% confidence interval: 0.70–5.90, P=0.001). In summary, we established the upper reference limit for UCCR using IMMULITE 2000 XPi in dogs and confirmed that UCCR is a useful diagnostic test for HC in dogs if urine samples are collected at home.
ArticleNumber 22-0131
Author NAGATA, Noriyuki
SASAKI, Noboru
TAKIGUCHI, Mitsuyoshi
YOKOYAMA, Nozomu
HOSOYA, Kenji
NAKAMURA, Kensuke
SAWAMURA, Hiryu
SASAOKA, Kazuyoshi
IKENAKA, Yoshinori
MORISHITA, Keitaro
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  fullname: HOSOYA, Kenji
  organization: Laboratory of Advanced Veterinary Medicine, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  fullname: TAKIGUCHI, Mitsuyoshi
  organization: Laboratory of Veterinary Internal Medicine, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  fullname: YOKOYAMA, Nozomu
  organization: Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  fullname: NAKAMURA, Kensuke
  organization: Laboratory of Veterinary Internal Medicine, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  fullname: SASAOKA, Kazuyoshi
  organization: Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  fullname: SASAKI, Noboru
  organization: Laboratory of Veterinary Internal Medicine, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  organization: Laboratory of Advanced Veterinary Medicine, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  fullname: NAGATA, Noriyuki
  organization: Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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  fullname: IKENAKA, Yoshinori
  organization: Translational Research Unit, Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
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Keywords Cushing’s syndrome
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References_xml – reference: 25. Smiley, L. E. and Peterson, M. E. 1993. Evaluation of a urine cortisol:creatinine ratio as a screening test for hyperadrenocorticism in dogs. J. Vet. Intern. Med. 7: 163–168.
– reference: 5. Cerundolo, R., Lloyd, D. H., Vaessen, M. M. A. R., Mol, J. A., Kooistra, H. S. and Rijnberk, A. 2007. Alopecia in pomeranians and miniature poodles in association with high urinary corticoid:creatinine ratios and resistance to glucocorticoid feedback. Vet. Rec. 160: 393–397.
– reference: 27. van Vonderen, I. K., Kooistra, H. S. and Rijnberk, A. 1998. Influence of veterinary care on the urinary corticoid:creatinine ratio in dogs. J. Vet. Intern. Med. 12: 431–435.
– reference: 2. Bennaim, M., Centola, S., Ramsey, I. and Seth, M. 2019. Clinical and clinicopathological features in dogs with uncomplicated spontaneous hyperadrenocorticism diagnosed in primary care practice (2013–2014). J. Am. Anim. Hosp. Assoc. 55: 178–186.
– reference: 11. Galac, S., Kooistra, H. S., Teske, E. and Rijnberk, A. 1997. Urinary corticoid/creatinine ratios in the differentiation between pituitary-dependent hyperadrenocorticism and hyperadrenocorticism due to adrenocortical tumour in the dog. Vet. Q. 19: 17–20.
– reference: 26. Stolp, R., Rijnberk, A., Meijer, J. C. and Croughs, R. J. 1983. Urinary corticoids in the diagnosis of canine hyperadrenocorticism. Res. Vet. Sci. 34: 141–144.
– reference: 1. Behrend, E. N., Kooistra, H. S., Nelson, R., Reusch, C. E. and Scott-Moncrieff, J. C. 2013. Diagnosis of spontaneous canine hyperadrenocorticism: 2012 ACVIM consensus statement (small animal). J. Vet. Intern. Med. 27: 1292–1304.
– reference: 23. Reusch, C. E. and Feldman, E. C. 1991. Canine hyperadrenocorticism due to adrenocortical neoplasia. Pretreatment evaluation of 41 dogs. J. Vet. Intern. Med. 5: 3–10.
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Snippet The urinary corticoid to creatinine ratio (UCCR) is one of the most commonly used screening tests for canine hypercortisolism (HC). In this study, a reference...
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SubjectTerms canine
Cushing’s syndrome
hyperadrenocorticism
Internal Medicine
urinary cortisol
Title Urinary corticoid to creatinine ratios using IMMULITE 2000 XPi for diagnosis of canine hypercortisolism
URI https://www.jstage.jst.go.jp/article/jvms/84/7/84_22-0131/_article/-char/en
https://www.ncbi.nlm.nih.gov/pubmed/35644575
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https://pubmed.ncbi.nlm.nih.gov/PMC9353093
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