Factors Associated With Short Withdrawal Time and Polyp Detection Rate During Colonoscopy

Study Overview
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Brief Summary
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Colonoscopy withdrawal times are a critical element in determining quality of colonoscopy; however, few studies have evaluated specific factors that may influence the duration of withdrawal, and specifically short withdrawal times. Other factors affecting polyp detection rate, one element of quality of colonoscopy, also need further study. By collecting data on hundreds of colonoscopies performed by 9 endoscopists, our goal was to identify factors associated with withdrawal time, inappropriately short withdrawal times, and polyp detection rate during colonoscopy.

Detailed Description
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Background: Colonoscopy withdrawal times are a critical element in determining quality of colonoscopy; however, few studies have evaluated specific factors that may influence the duration of withdrawal, and specifically short withdrawal times. Other factors affecting polyp detection rate, one element of quality of colonoscopy, also need further study. Objective: To identify factors associated with withdrawal time, inappropriately short withdrawal times, and polyp detection rate during colonoscopy. Design: Data were prospectively collected (05/08-06/09) on 802 colonoscopies conducted by 9 blinded endoscopists, including patient age and sex, indication, colonoscope insertion and withdrawal time, biopsies performed, number/size of polyps and method of resection, bowel preparation quality, time of day, day of week, endoscopist, position of the procedure within the endoscopist's slate, and call status of the endoscopist. Setting: This study was conducted at a single tertiary care hospital, St. Paul's Hospital, in Vancouver, British Columbia.

Official Title
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Factors Associated With Short Withdrawal Time and Polyp Detection Rate During Colonoscopy

Conditions
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Colon Polyps

Intervention / Treatment
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* Other: No intervention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All adult patients undergoing colonoscopy at St. Paul's Hospital in Vancouver, BC. Exclusion Criteria: Exclusion criteria were prior colon resection and repeat colonoscopy for the purpose of endoscopic therapy for known lesions.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients undergoing colonoscopy<br>Data was collected on all adult patients undergoing outpatient colonoscopy at St. Paul's Hospital from May 2008 to June 2009. Exclusion criteria were prior colon resection and repeat colonoscopy for the purpose of endoscopic therapy for known lesions. | Other: No intervention<br>* Colonoscopies were conducted as per the endoscopist's usual practice. No change in protocol was expected.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Colonoscopy, quality assurance, withdrawal time, polyp detection rate