title: Quantitative noninvasive testing for Helicobacter pylori does not predict gastroduodenal ulcer disease.
abstract: BACKGROUND
  Helicobacter pylori is strongly associated with gastric and duodenal ulcer disease. However, the diagnosis of gastroduodenal ulcers requires an endoscopic or radiographic examination. In this study, we attempted to establish a relationship between the magnitude of [13C]urea breath test results or serum H. pylori IgG levels and endoscopic findings in H. pylori-infected individuals.
  
  
  METHODS
  Patients who had undergone endoscopy and had a positive [13C]urea breath test and/or positive H. pylori IgG serology were identified. Endoscopic diagnoses included duodenal ulcer, gastric ulcer, nonulcer dyspepsia, and others. Results of 6% or greater on the [13C]urea breath test was defined as positive for H. pylori infection. H. pylori IgG serology was determined by an enzyme linked immunosorbent assay with values of greater than or equal to 1.0 being seropositive.
  
  
  RESULTS
  One hundred seventy-five patients were seropositive (mean = 3.01 +/- 1.58). One hundred sixty-eight patients had a positive [13C]urea breath test (mean = 25.43 +/- 16.90). One hundred fifty-five patients were common to both the groups. Statistical analysis did not reveal any relationship between quantitative [13C]urea breath test results or H. pylori IgG values and endoscopic diagnoses.
  
  
  CONCLUSIONS
  The magnitude of [13C]urea breath test or H. pylori IgG serology cannot be used to predict the presence or absence of gastroduodenal ulcer disease.
authors.affiliation: Section of Gastroenterology, Sinai Hospital, Detroit, MI 48235, USA.
authors.forename: T K
authors.initials: TK
authors.lastname: Sharma
authors.forename: V M
authors.initials: VM
authors.lastname: Prasad
authors.forename: A F
authors.initials: AF
authors.lastname: Cutler
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood; D001944:Breath Tests; D016022:Case-Control Studies; D016145:Endoscopy, Digestive System; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D016481:Helicobacter Infections / Q000175:diagnosis*; D016480:Helicobacter pylori / Q000302:isolation & purification*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000175:diagnosis / Q000453:epidemiology* / Q000382:microbiology; D011237:Predictive Value of Tests
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G