BACKGROUND 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. METHOD 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. RESULTS Of 1062 patients identified, mean age was 68 years 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). CONCLUSIONS 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.

中文翻译：

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择期结直肠切除术的重复术前内镜检查率和预测因素：我们如何避免重复手术？

背景技术尽管内窥镜检查资源有限，但通常会在手术前重复进行内窥镜检查。我们的目的是确定加拿大一家高容量三级中心的重复术前内窥镜检查率和影响这种做法的因素。方法 对 2007 年至 2017 年在加拿大温尼伯三级中心接受良性和恶性肿瘤选择性结直肠切除术的所有患者进行了一项回顾性队列研究。使用多变量逻辑回归分析来确定重复术前内镜检查的预测因素。结果 在确定的 1062 名患者中，平均年龄为 68 岁，56% 为男性。重复术前内镜检查率为 29%。在多变量分析中，男性（OR 1.68，CI 1.19-2.34，p = 0.003）和位于左结肠的病变（OR 2.73，CI 1.79-4.14，p < 0.001），直肠乙状结肠（OR 9.11，CI 2.14-38.8，p = 0.003）和直肠（OR 4.06，CI 2.58-6.38，p < 0.001）接受重复术前内镜检查的几率增加。在索引内窥镜检查时有纹身的患者接受重复术前内窥镜检查的几率明显较低（OR 0.48，CI 0.34-0.68，p < 0.001）。索引内镜师专业不是重复内镜检查的重要预测因素（OR 0.76，CI 0.54-1.06，p = 0.09）。结论 重复术前下腔镜检查是常见的做法，如果已实现对病变的适当识别和记录，则可能没有必要。可疑病变的纹身是一个关键的可修改因素，可降低重复术前内镜检查的可能性。