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Does the diagnostic accuracy of the 13C-urea breath test vary with age even after the application of urea hydrolysis rate?

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Title: Does the diagnostic accuracy of the 13C-urea breath test vary with age even after the application of urea hydrolysis rate?
Authors: Yang, Hye Ran, Ko, Jae Sung, Seo, Jeong Kee
Contributors: 양혜란, 고재성, 서정기
Publisher Information: Wiley-Blackwell
Publication Year: 2008
Collection: Seoul National University: S-Space
Subject Terms: Adolescent, Age Factors, Bacterial Proteins/metabolism, Breath Tests/*methods, Calibration, Carbon Isotopes/metabolism, Child, Preschool, Endoscopy, Gastrointestinal, False Positive Reactions, Female, Helicobacter Infections/*diagnosis/metabolism/*microbiology/pathology, Helicobacter pylori/isolation & purification/*metabolism, Humans, Hydrolysis, Infant, Male, Urea/*analysis/metabolism, Urease/metabolism
Description: BACKGROUND: Endogenous CO(2) production may be a possible explanation for higher false-positive results reported for (13)C-urea breath test (UBT) in children below 6 years. In this study, we evaluated whether age affects the diagnostic accuracy of the (13)C-UBT even after the application of urea hydrolysis rate (UHR) in children. METHODS: A total of 612 (13)C-UBTs and endoscopic biopsies were performed on children divided into two groups; children under 6 years (n = 126) and children aged 6-18 years (n = 486). For (13)C-UBT, 75 mg (13)C-urea was ingested, and breath sample was collected 30 minutes later. Delta over baseline (DOB) was determined, and UHR was calculated to normalize the DOB values for endogenous CO(2) production. RESULTS: There was significant difference between the DOB values of children under 6 years and those of children over 6 years in H. pylori-positive (p = .029) and -negative groups (p = .002). On applying the UHR, no significant difference was observed between the UHR values of children under 6 years and those of children over 6 years in H. pylori-positive (p = .877) and -negative groups (p = .427). In 12.6% children under 6 years, false-positive results were observed on applying the DOB, and in 9.0% on applying the UHR (p = .125). CONCLUSIONS: The (13)C-UBT is a noninvasive method exhibiting high diagnostic accuracy with both UHR as well as DOB. However, high false-positive results for (13)C-UBT were noted in children below 6 years on applying both UHR as well as DOB. Thus, this may not only be due to the effects of endogenous CO(2) production but also due to other factors. ; This research was supported by the Grant-in-Aid for Medical Science Research, Seoul National University Hospital (grant no. 04-2003-044-0).
Document Type: article in journal/newspaper
Language: English
Relation: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18665931; https://hdl.handle.net/10371/68152
DOI: 10.1111/j.1523-5378.2008.00608.x
Availability: https://hdl.handle.net/10371/68152
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18665931
https://doi.org/10.1111/j.1523-5378.2008.00608.x
Accession Number: edsbas.A8AC351
Database: BASE
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  Data: Does the diagnostic accuracy of the 13C-urea breath test vary with age even after the application of urea hydrolysis rate?
– Name: Author
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  Data: <searchLink fieldCode="AR" term="%22Yang%2C+Hye+Ran%22">Yang, Hye Ran</searchLink><br /><searchLink fieldCode="AR" term="%22Ko%2C+Jae+Sung%22">Ko, Jae Sung</searchLink><br /><searchLink fieldCode="AR" term="%22Seo%2C+Jeong+Kee%22">Seo, Jeong Kee</searchLink>
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  Data: 양혜란<br />고재성<br />서정기
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  Data: Wiley-Blackwell
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  Data: 2008
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  Data: Seoul National University: S-Space
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  Data: <searchLink fieldCode="DE" term="%22Adolescent%22">Adolescent</searchLink><br /><searchLink fieldCode="DE" term="%22Age+Factors%22">Age Factors</searchLink><br /><searchLink fieldCode="DE" term="%22Bacterial+Proteins%2Fmetabolism%22">Bacterial Proteins/metabolism</searchLink><br /><searchLink fieldCode="DE" term="%22Breath+Tests%2F*methods%22">Breath Tests/*methods</searchLink><br /><searchLink fieldCode="DE" term="%22Calibration%22">Calibration</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+Isotopes%2Fmetabolism%22">Carbon Isotopes/metabolism</searchLink><br /><searchLink fieldCode="DE" term="%22Child%22">Child</searchLink><br /><searchLink fieldCode="DE" term="%22Preschool%22">Preschool</searchLink><br /><searchLink fieldCode="DE" term="%22Endoscopy%22">Endoscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Gastrointestinal%22">Gastrointestinal</searchLink><br /><searchLink fieldCode="DE" term="%22False+Positive+Reactions%22">False Positive Reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Female%22">Female</searchLink><br /><searchLink fieldCode="DE" term="%22Helicobacter+Infections%2F*diagnosis%2Fmetabolism%2F*microbiology%2Fpathology%22">Helicobacter Infections/*diagnosis/metabolism/*microbiology/pathology</searchLink><br /><searchLink fieldCode="DE" term="%22Helicobacter+pylori%2Fisolation+%26+purification%2F*metabolism%22">Helicobacter pylori/isolation & purification/*metabolism</searchLink><br /><searchLink fieldCode="DE" term="%22Humans%22">Humans</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrolysis%22">Hydrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Infant%22">Infant</searchLink><br /><searchLink fieldCode="DE" term="%22Male%22">Male</searchLink><br /><searchLink fieldCode="DE" term="%22Urea%2F*analysis%2Fmetabolism%22">Urea/*analysis/metabolism</searchLink><br /><searchLink fieldCode="DE" term="%22Urease%2Fmetabolism%22">Urease/metabolism</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: BACKGROUND: Endogenous CO(2) production may be a possible explanation for higher false-positive results reported for (13)C-urea breath test (UBT) in children below 6 years. In this study, we evaluated whether age affects the diagnostic accuracy of the (13)C-UBT even after the application of urea hydrolysis rate (UHR) in children. METHODS: A total of 612 (13)C-UBTs and endoscopic biopsies were performed on children divided into two groups; children under 6 years (n = 126) and children aged 6-18 years (n = 486). For (13)C-UBT, 75 mg (13)C-urea was ingested, and breath sample was collected 30 minutes later. Delta over baseline (DOB) was determined, and UHR was calculated to normalize the DOB values for endogenous CO(2) production. RESULTS: There was significant difference between the DOB values of children under 6 years and those of children over 6 years in H. pylori-positive (p = .029) and -negative groups (p = .002). On applying the UHR, no significant difference was observed between the UHR values of children under 6 years and those of children over 6 years in H. pylori-positive (p = .877) and -negative groups (p = .427). In 12.6% children under 6 years, false-positive results were observed on applying the DOB, and in 9.0% on applying the UHR (p = .125). CONCLUSIONS: The (13)C-UBT is a noninvasive method exhibiting high diagnostic accuracy with both UHR as well as DOB. However, high false-positive results for (13)C-UBT were noted in children below 6 years on applying both UHR as well as DOB. Thus, this may not only be due to the effects of endogenous CO(2) production but also due to other factors. ; This research was supported by the Grant-in-Aid for Medical Science Research, Seoul National University Hospital (grant no. 04-2003-044-0).
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  Data: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18665931; https://hdl.handle.net/10371/68152
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  Data: 10.1111/j.1523-5378.2008.00608.x
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        Value: 10.1111/j.1523-5378.2008.00608.x
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      – Text: English
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      – SubjectFull: Age Factors
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      – SubjectFull: Bacterial Proteins/metabolism
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