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Case Volume and Adenoma Detection Rates During Screening Colonoscopy

55 Years
85 Years
Not Enrolling
Colorectal Cancer

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Trial Information

Case Volume and Adenoma Detection Rates During Screening Colonoscopy

21 private practice gastroenterologist endoscopists from Berlin performed a prospective
quality assessment study including at least 10.000 screening colonoscopies. After informed
consent, patients data are included (age, sex, family history, colonoscopy performance
parameters and findings, therapy performed, histology of biopsies and/or polypectomies,
complications (immediate and late) and patient acceptance. The latter was retrieved by
patient questionnaires returned after a minimum of 2 weeks. Data were centrally collected in
an anonymized way

Primary outcome parameter:

- Correlation of adenoma detection rate with case volume and other confounding factors
(e.g., withdrawal time)

Secondary outcome parameters:

- Complications and method of assessment (immediate recording versus later questionnaire

- Quality of bowel preparation in relation to outcome Patient acceptance in relation to
procedural factors (e.g., sedation)

- Quality of pathology reports and histologic outcome of polypectomy

Later follow-up (after 5-10 years) of the preventive effect of colonoscopy is planned and
has been part of the protocol and patient consent form.

Inclusion Criteria:

- all persons willing and able to undergo screening colonoscopy over the age of 55

Exclusion Criteria:

- any condition not compatible with the definition of screening colonoscopy

Type of Study:


Study Design:

Observational Model: Cohort, Time Perspective: Prospective

Outcome Measure:

Correlation of adenoma detection rate with case volume of endoscopists

Outcome Time Frame:

18 months

Safety Issue:


Principal Investigator

Thomas Rösch, MD

Investigator Role:

Principal Investigator

Investigator Affiliation:

Department of Interdisciplinary Endoscopy, Hamburg University Eppendorf, Germany


Germany: Federal Institute for Drugs and Medical Devices

Study ID:




Start Date:

October 2006

Completion Date:

March 2009

Related Keywords:

  • Colorectal Cancer
  • colorectal cancer
  • prevention
  • colonoscopy
  • screening
  • quality assessment
  • colorectal cancer prevention
  • Adenoma
  • Colorectal Neoplasms