Abstract
Despite limited endoscopy resources, repeat endoscopy prior to surgery is commonly practised. Our aim was to determine repeat preoperative endoscopy rates and factors influencing this practice at a high-volume Canadian tertiary centre. A retrospective cohort study was conducted on all patients undergoing elective colorectal resections for benign and malignant neoplasms at a tertiary centre in Winnipeg, Canada between 2007 and 2017. Multivariable logistic regression analysis was used to identify predictors of repeat preoperative endoscopy. Of 1062 patients identified, mean age was 68years and 56% were male. Rate of repeat preoperative endoscopy was 29%. On multivariable analysis, male sex (OR 1.68, CI 1.19-2.34, p = 0.003) and lesions located in the left colon (OR 2.73, CI 1.79-4.14, p < 0.001), rectosigmoid (OR 9.11, CI 2.14-38.8, p = 0.003), and rectum (OR 4.06, CI 2.58-6.38, p < 0.001) were at increased odds of undergoing repeat preoperative endoscopy. Patients with a tattoo placed at index endoscopy were at markedly lower odds of undergoing repeat preoperative endoscopy (OR 0.48, CI 0.34-0.68, p < 0.001). Index endoscopist specialty was not a significant predictor of repeat endoscopy (OR 0.76, CI 0.54-1.06, p = 0.09). Repeat preoperative lower endoscopy is commonly practised and may be unnecessary if appropriate identification and documentation of lesions has been achieved. Tattooing of suspicious lesions is a key modifiable factor associated with reduced likelihood of repeat preoperative endoscopy. This study highlights the need for standardized guidelines and endoscopy reporting practices given the delays and costs associated with repeat preoperative endoscopy.
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