Anesthesia Assistance in Screening Colonoscopy and Adenoma Detection Rate Among Trainees

Anna Krigel, Anish Patel, Jeremy Kaplan, Xiao Fei Kong, Reuben Garcia-Carrasquillo, Benjamin Lebwohl, Suneeta Krishnareddy

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Background and Aims: The use of anesthesia assistance (AA) for screening colonoscopy has been increasing substantially over the past decade, raising concerns about procedure safety and cost without demonstrating a proven improvement in overall quality indicators such as adenoma detection rate (ADR). The effect of AA on ADR has not been extensively studied among trainees learning colonoscopy. We aimed to determine whether type of sedation used during screening colonoscopy affects trainee ADR. Methods: Using the electronic endoscopy databases of two hospitals in our medical center, we identified colonoscopies performed by 15 trainees from 2014 through 2018, including all screening examinations in which the cecum was reached. Multivariable logistic regression was used to determine factors associated with adenoma detection. Results: We identified 1420 unique patients who underwent screening colonoscopy by a trainee meeting the inclusion criteria. Of these, 459 (32.3%) were performed with AA. Overall trainee ADR was 39.6%, with ADR increasing from 35.0% in year one of training to 42.8% in year three (p = 0.047). ADR for cases with AA was 37.9%, while ADR for conscious sedation cases was 32.0% (p = 0.374). Despite this 5.9% absolute difference, the use of AA was not associated with finding an adenoma on multivariable analysis when controlling for patient age, sex, smoking status, body mass index, trainee year of training, mean withdrawal time, supervising attending ADR, and bowel preparation quality (OR 0.85; 95% CI 0.67–1.09). Conclusions: Despite providing the ability to more consistently sedate patients, the use of AA did not affect trainee ADR. These results on trainee ADR and sedation type suggest that the overall lack of association between AA use and ADR is applicable to the trainee setting.

Original languageEnglish (US)
Pages (from-to)961-968
Number of pages8
JournalDigestive Diseases and Sciences
Issue number4
StatePublished - Apr 1 2020
Externally publishedYes


  • Adenoma density under the curve
  • Colonoscopy
  • Propofol
  • Sedation
  • Trainee

ASJC Scopus subject areas

  • Physiology
  • Gastroenterology


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