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
enquiry)

- 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.