Repeat Colonoscopy Within 6 Months After Initial Outpatient Colonoscopy in Ontario: A Population-Based Cross-Sectional Study

Can J Gastroenterol Hepatol. 2017;2017:5917057. doi: 10.1155/2017/5917057. Epub 2017 Sep 7.

Abstract

Background: The goal of this study is to examine utilization of early repeat colonoscopy ≤ 6 months after an index procedure.

Methods: We identified persons having repeat colonoscopy ≤ 6 months following outpatient colonoscopy without prior colonoscopy ≤ 5 years or prior diagnosis of colorectal cancer (CRC). We modeled repeat colonoscopy using a generalized estimating equation with an exchangeable correlation structure to account for clustering of patients by endoscopist.

Results: The population included 334,663 persons, 7,892 (2.36%) of whom had an early repeat colonoscopy within 6 months. Overall, endoscopist prior year colonoscopy volume was inversely related to repeat ≤ 6 months. Repeat colonoscopy ≤ 6 months varied by the clinical setting of the index colonoscopy (adjusted OR = 1.41 (95% CI 1.29-1.55)) at nonhospital facilities compared to teaching or community hospitals. Among those who had polypectomy or biopsy, the adjusted OR for early repeat ≤ 6 months was elevated among those whose index colonoscopy was at a nonhospital facility (OR 1.44, 95% CI 1.30-1.60), compared to those at a teaching hospital or community hospital.

Conclusions: Repeat colonoscopy ≤ 6 months after an index procedure is associated with the clinical setting of the index colonoscopy.

MeSH terms

  • Aged
  • Ambulatory Care / methods*
  • Biopsy
  • Colonic Polyps / surgery*
  • Colonoscopy / methods*
  • Colorectal Neoplasms / diagnosis*
  • Cross-Sectional Studies
  • Female
  • Humans
  • Male
  • Middle Aged
  • Ontario