• Franco Radaelli, Gianmichele Meucci, Giusy Sgroi, Giorgio Minoli, and Italian Association of Hospital Gastroenterologists (AIGO).
• Department of Gastroenterology, Valduce Hospital, Como, Italy.
• Am. J. Gastroenterol. 2008 May 1; 103 (5): 1122-30.

BackgroundIt is essential to identify the factors in clinical practice that influence the technical performance of colonoscopy as a basis for quality improvement programs.AimsTo assess the factors linked to two key indicators of colonoscopy performance, i.e., cecal intubation and polyp diagnosis.Design And SettingConsecutives colonoscopies performed over a 2-wk period in 278 unselected practice sites throughout Italy were prospectively evaluated. A multivariate model was developed to identify determinants of the performance indicators of colonoscopy.ResultsIn total, 12,835 patients (mean age 60.5 yr, standard deviation [SD] 15.1, 53% men) were studied. Sedation and/or analgesia was administered in 55.3% of procedures: 28.8% of patients received intravenous (IV) benzodiazepines, 15.4% received benzodiazepines in combination with narcotics, 3.1% received propofol, and 7.5% received other sedation regimens. Overall, cecal intubation was achieved in 80.7% of procedures, and the polyp detection rate was 27.3%. Multivariate analysis showed that the strongest predictors of cecal intubation were the quality of bowel preparation (inadequate vs excellent: odds ratio [OR] 0.013, 95% confidence interval [CI] 0.009-0.018; fair vs excellent: OR 0.246, 95% CI 0.209-0.290; and good vs excellent: OR 0.586, 95% CI 0.514-0.667) and the use of sedation (IV benzodiazepines vs no sedation: OR 1.460, 95% CI 1.282-1.663; IV benzodiazepines and narcotics vs no sedation: OR 2.128, 95% CI 1.776-2.565; and propofol vs no sedation: OR 2.355, 95% CI 1.590-3.488). The colonoscopy setting (workload and organizational complexity of the center) and the endoscopist colonoscopy volume were other factors independently correlated with completion of the procedure. Detection of polyps partially depended on the quality of bowel cleansing (inadequate vs excellent: OR 0.511, 95% CI 0.404-0.647) and use of sedation (OR 1.172, 95% CI 1.074-1.286).ConclusionIn usual clinical practice, the use of sedation/analgesia, the colon-cleansing quality, the endoscopist experience, and some features related to the colonscopy setting decisively influence the quality of colonoscopy. These factors indicate the targets of future corrective measures to boost the quality of this examination.

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