The impact of suboptimal bowel preparation on adenoma miss rates and the factors associated with early repeat colonoscopy

Background There are no guidelines for the recommended interval to the next examination after colonoscopy with suboptimal bowel preparation. Objective To identify factors associated with early repeat colonoscopy after initial examinations with suboptimal preparations and to measure adenoma miss rates in this context. Design Retrospective study. Setting Hospital-based endoscopy unit. Patients Bowel preparation quality was recorded in 12,787 patients. Results Of 12,787 colonoscopies, preparation quality was suboptimal (poor or fair) in 3047 patients (24%). Among these 3047 patients, repeat examination was performed in