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Position Changes During Colonoscope Withdrawal and Polyp Detection

This study has been completed.
Information provided by (Responsible Party):
University of British Columbia Identifier:
First received: July 13, 2011
Last updated: September 29, 2014
Last verified: September 2014
The purpose of this study is to determine whether position changes during colonoscope withdrawal affects polyp detection rate. We hypothesize that positions change during scope withdrawal will increase polyp detection rate.

Condition Intervention
Colonic Polyp Procedure: Position change Procedure: Standard

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Position Changes During Colonoscope Withdrawal to Increase Polyp Detection: a Prospective Randomized Trial

Resource links provided by NLM:

Further study details as provided by University of British Columbia:

Primary Outcome Measures:
  • Polyp detection rate [ Time Frame: 6 minutes ]

Enrollment: 776
Study Start Date: July 2011
Study Completion Date: December 2013
Primary Completion Date: July 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Control
Subject will undergo standard colonoscopy.
Procedure: Standard
Subjects will undergo standard colonoscopy without position changes during scope withdrawal.
Active Comparator: Position change
Subject will under go standard colonoscopy, but also with position changes during colonoscope withdrawal.
Procedure: Position change
Patients will be randomly assigned to two groups: Control group (those who will receive standard colonoscopy without position changes) and Position change group (those who will undergo position changes during colonoscope withdrawal during colonoscopy). Subjects in position change group will be asked to shift into three different positions during colonoscope withdrawal.


Ages Eligible for Study:   40 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Outpatients undergoing colonoscopy
  • Age 40 or greater

Exclusion Criteria:

  • Inpatient colonoscopy
  • Unable to provide informed consent
  • Unable to complete colonoscopy to cecum
  • Previous bowel resection, inflammatory bowel disease, polyposis syndrome
  • Musculoskeletal disorder or other mobility issue limiting effective patient position changes
  • Inadequate bowel preparation
  Contacts and Locations
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Please refer to this study by its identifier: NCT01395173

Canada, British Columbia
St. Paul's Hospital
Vancouver, British Columbia, Canada, V6Z 2K5
Sponsors and Collaborators
University of British Columbia
Principal Investigator: Jennifer Telford, MD, FRCPC University of British Columbia
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: University of British Columbia Identifier: NCT01395173     History of Changes
Other Study ID Numbers: H11-00087
Study First Received: July 13, 2011
Last Updated: September 29, 2014

Keywords provided by University of British Columbia:

Additional relevant MeSH terms:
Colonic Polyps
Pathological Conditions, Anatomical
Intestinal Polyps processed this record on September 19, 2017