We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Validation of RDQ Questionnaire

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00291746
Recruitment Status : Completed
First Posted : February 15, 2006
Last Update Posted : March 12, 2009
Information provided by:

Brief Summary:
The primary objective of this study is to determine the accuracy of the Reflux Disease Questionnaire (RDQ) as a diagnostic test for gastroesophageal reflux disease. Symptom evaluation by the RDQ will be compared with other established approaches to the diagnosis of gastroesophageal reflux disease (GERD) in a primary care patient population with symptoms thought to be of upper gastrointestinal (GI) tract origin.

Condition or disease Intervention/treatment Phase
Gastroesophageal Reflux Drug: Esomeprazole Procedure: Bravo technique Phase 4

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Enrollment : 350 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Single
Primary Purpose: Diagnostic
Official Title: A Single-Blind Single Arm Study to Validate the Reflux Disease Questionnaire (RDQ) for the Diagnosis of Reflux Disease in Primary Care in Patients Treated With Esomeprazole 40 mg o.d.
Study Start Date : September 2005
Actual Study Completion Date : November 2006

Resource links provided by the National Library of Medicine

MedlinePlus related topics: GERD

Primary Outcome Measures :
  1. Selection of RDQ items (RDQ will be completed by subject at Screening and visit 4)
  2. Presence/absence of GERD as assessed by endoscopic Los Angeles (LA) grade (gastroesophageal endoscopy will be performed at visit 2)
  3. pH monitoring (% time with esophageal pH<4; Bravo pH-Monitoring will be performed from visit 2 to 3.1)
  4. Symptom Associated Probability (outcome test for Bravo pH monitoring)
  5. Outcome of PPI test (is assessed between visit 3.2 and 4.

Secondary Outcome Measures :
  1. Mean item score for the GSRS dimensions at the initial and last visit (as assessed by answers of patient at visit 1 and visit 4)
  2. RDQ item scores and RDQ mean item scores for RDQ dimensions at baseline and at the end of treatment (as assessed by answers of patient at Screening and visit 4)
  3. Occurrence and severity of clinical symptoms at the initial and last visit (as reported by the subject)

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 79 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subjects who seek medical advice at their family doctor (primary care physician) for symptoms thought by the primary care physician to arise from the upper GI tract
  • The symptoms thought to pertain to the upper GI tract must have been present for at least 4 weeks prior to Visit 1 and to have occurred at least twice a week during that period
  • The symptoms thought to pertain to the upper GI tract must have been of at least mild severity for a minimum of 3 days during the week prior to Visit 1

Exclusion Criteria:

  • Upper GI endoscopy performed within a year prior to Visit 1
  • Previous anti-reflux surgery, surgery for peptic ulcer or any form of upper gastrointestinal resective surgery
  • Contra-indication to the Bravo™ procedure such as subjects with a history of bleeding diathesis, strictures anywhere along the GI-tract, esophageal varices, obstructions, or subjects equipped with a pacemaker, an implantable cardiac defibrillator or an implantable neurostimulator (NB: subjects with severe esophagitis (grade D) confirmed by endoscopy at Visit 2 can continue the study without performing the Bravo™ procedure)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00291746

Layout table for location information
Canada, Ontario
Research Site
Etobicoke, Ontario, Canada
Research Site
Hamilton, Ontario, Canada
Research Site
North York, Ontario, Canada
Canada, Quebec
Research Site
Mirabel, Quebec, Canada
Research Site
Pointe-Claire, Quebec, Canada
Research Site
Saint-Jerome, Quebec, Canada
Research Site
Saint-Leonard, Quebec, Canada
Research Site
Glostrup, Denmark
Research Site
Herning, Denmark
Research Site
Odense, Denmark
Research Site
Randers, Denmark
Research Site
Berlin, Germany
Research Site
Bochum, Germany
Research Site
Dresden, Germany
Research Site
Garmisch-Partenkirchen, Germany
Research Site
Halle, Germany
Research Site
Magdeburg, Germany
Research Site
Mainz, Germany
Research Site
München, Germany
Research Site
Münster, Germany
Research Site
Siegen, Germany
Research Site
Bergen, Norway
Research Site
Göteborg, Västra Götaland, Sweden
Research Site
Lund, Sweden
Research Site
Skövde, Sweden
Research Site
Stockholm, Sweden
United Kingdom
Research Site
Bicester, United Kingdom
Research Site
Coventry, United Kingdom
Research Site
London, United Kingdom
Research Site
West Bromwich, United Kingdom
Sponsors and Collaborators
Layout table for investigator information
Study Director: AstraZeneca Nexium Medical Science Director, MD AstraZeneca
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Layout table for additonal information
ClinicalTrials.gov Identifier: NCT00291746    
Other Study ID Numbers: D9914C00002
First Posted: February 15, 2006    Key Record Dates
Last Update Posted: March 12, 2009
Last Verified: March 2009
Keywords provided by AstraZeneca:
Additional relevant MeSH terms:
Layout table for MeSH terms
Gastroesophageal Reflux
Esophageal Motility Disorders
Deglutition Disorders
Esophageal Diseases
Gastrointestinal Diseases
Digestive System Diseases
Anti-Ulcer Agents
Gastrointestinal Agents
Proton Pump Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action