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Outcome of Colonoscopy Screening and Surveillance

18 Years
Open (Enrolling)

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Trial Information

Outcome of Colonoscopy Screening and Surveillance

The investigator's goal is to collect data from the endoscopy reports and clinic station
reports to complete a descriptive analysis of the demographics, colonoscopy procedure
performance, and assess the type of benign colon polyps detected during screening and
surveillance from 02/01/2009 - 12/31/2020.

Specific variable to be reviewed:

1. Patient Demographics: Age, Sex, Race, Height, Weight, BMI (patient privacy will be

2. Indications for Colonoscopy (screening, surveillance, symptoms or tertiary referral

3. Comorbid conditions: cancer and surgical history, medical conditions,

4. Colonoscopy procedure; quality of colon preparation (using the Boston Bowel Preparation
Scale) 0 - 3 for each section of the colon (Ascending, Transverse, Descending and Total
Colon) , cecal intubation rate, cecal intubation and total procedure time, type of
colonoscope (if CO2 was used in the procedure and techniques for colonoscope insertion,
including position changes.

5. Examination findings: number of polyps and nature of polyps removed (site, size,
surface, vascular pattern); type of polyp removed; optical features and histology of

6. Resection techniques: biopsy, snare resection, endoscopic mucosal resection etc.

7. Including Pathology report findings so that a comparison can be made of the optical
features and actual pathology report.

8. Outcomes of colonoscopy: adenoma detections

9. Outcome of colonoscopy: Complications (Bleeding and performance)

Inclusion Criteria:

1. All patients who have undergone colonoscopy for screening, surveillance or symptom

Exclusion Criteria:

1. None

Type of Study:


Study Design:

Observational Model: Cohort, Time Perspective: Prospective

Outcome Measure:

Polyp Detection in Colon Cancer Screening and Surveillance

Outcome Description:

Descriptive tables presented for demographics, polyp counts, colonoscopy experiences, polyp removals and findings. Proportions presented with 95% confidence intervals. Continuous values such as age and times presented with median, minimum and maximum. Comparisons among patient subgroups made with chi-square tests for categorical data and t-tests or the non-parametric alternative, Wilcoxon tests, to compare continuous measures. Graphics such as box plots, trellis plots, bar graphs, or stacked bar graphs used to describe distributions overall and among subgroups.

Outcome Time Frame:

9 years

Safety Issue:


Principal Investigator

Gottumukkala S. Raju, MD

Investigator Role:

Principal Investigator

Investigator Affiliation:

M.D. Anderson Cancer Center


United States: Institutional Review Board

Study ID:




Start Date:

September 2011

Completion Date:

Related Keywords:

  • Gastroenterology
  • Gastroenterology
  • Colonoscopy
  • Screening
  • Surveillance
  • Symptom evaluation
  • Chart review
  • Data review
  • Examination findings
  • Resection techniques
  • Pathology reports



University of Texas MD Anderson Cancer Center Houston, Texas  77030