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Showing content from https://pubmed.ncbi.nlm.nih.gov/22910933/ below:

Role of colonoscopy and polyp characteristics in colorectal cancer after colonoscopic polyp detection: a population-based case-control study

Affiliations

• ¹ Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany. h.brenner@dkfz.de

• PMID: 22910933
• DOI: 10.7326/0003-4819-157-4-201208210-00002

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Hermann Brenner et al. Ann Intern Med. 2012.

• ¹ Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany. h.brenner@dkfz.de

• PMID: 22910933
• DOI: 10.7326/0003-4819-157-4-201208210-00002

Item in Clipboard

Background: Studies have identified characteristics of adenomas detected on colonoscopy to be predictive of adenoma recurrence.

Objective: To assess the role of both colonoscopy-related factors and polyp characteristics on the risk for colorectal cancer after colonoscopic polyp detection.

Design: Population-based case-control study (3148 case participants and 3274 control participants).

Setting: Rhine-Neckar region of Germany.

Patients: Case and control participants with physician-validated detection of polyps (other than hyperplastic polyps) at a previous colonoscopy in the past 10 years.

Measurements: Detailed history and results of previous colonoscopies were obtained through interviews and medical records. Case and control participants were compared according to colonoscopy-related factors (incompleteness, poor bowel preparation, incomplete removal of all polyps, and no surveillance colonoscopy within 5 years) and polyp characteristics (≥ 1 cm, villous components or high-grade dysplasia, ≥ 3 polyps, and ≥ 1 proximal polyp). Odds ratios (ORs) and attributable fractions were derived by using multiple logistic regression and the Levin formula.

Results: 155 case participants and 260 control participants with physician-validated polyp detection in the past 10 years were identified. The following characteristics were significantly more common among case participants than among control participants: not all polyps completely removed (29.0% vs. 9.6%; OR, 3.73 [95% CI, 2.11 to 6.60]), no surveillance colonoscopy within 5 years (26.5% vs. 11.5%; OR, 2.96 [CI, 1.70 to 5.16]), and detection of 3 or more polyps (14.2% vs. 7.3%; OR, 2.21 [CI, 1.07 to 4.54]). Odds ratios ranged from 1.12 to 1.42 and CIs included 1.00 for all other variables. Overall, 41.1% and 21.7% of cancer cases were statistically attributable to colonoscopy-related factors and polyp characteristics, respectively.

Limitation: This was an observational study with potential for residual confounding and selection bias.

Conclusion: Colonoscopy-related factors are more important than polyp characteristics for stratification of colorectal cancer risk after colonoscopic polyp detection in the community setting.

PubMed Disclaimer

• Colonoscopy and polyp characteristics.

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