Background and Aims

Appropriate colonoscopy withdrawal times for individual colonic segments are not well known. The relationship between withdrawal time and adenoma detection rate (ADR)/polyp detection rate (PDR) in individual colonic segments was examined in this study.

Methods

This was a prospective observational study involving 724 patients who underwent colonoscopy screening or surveillance colonoscopy from October 2015 to February 2017 at 10 university hospitals.

Results

In the right side of the colon, the ADR (33.2% vs 13.7%, P < .001), PDR, serrated polyp detection rate, and number of adenomas per colonoscopy (APC) were significantly higher when the colonoscopy withdrawal time was ≥2 minutes compared with <2 minutes. When the withdrawal time was ≥4 minutes in the proximal colon and ≥3 minutes in the left segment of the colon, the ADR, PDR, and APC were significantly higher compared with withdrawal times of <4 minutes and <3 minutes, respectively. Multivariate analyses showed that the ADR was significantly associated with withdrawal times of ≥2 minutes in the right side of the colon (odds ratio [OR], 2.98; 95% confidence interval [CI], 1.72-5.15; P < .001), ≥4 minutes in the proximal colon (OR, 4.48; 95% CI, 3.15-6.36; P < .001), and ≥3 minutes in the left segment of the colon (OR, 2.92; 95% CI, 1.74-4.91; P < .001).

Conclusions

The PDR and ADR appeared to be significantly increased when the withdrawal time was ≥2 minutes in the right-sided colon segment, ≥4 minutes in the proximal colon, and ≥3 minutes in the left-sided colon segment compared with shorter withdrawal times.

中文翻译：

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内镜下撤药时间与单个结肠段腺瘤/息肉检出率之间的关系：KASID多中心研究

背景和目标

各个结肠段合适的结肠镜检查停药时间尚不为人所知。在这项研究中检查了撤回时间与单个结肠段中腺瘤检出率（ADR）/息肉检出率（PDR）之间的关系。

方法

这是一项前瞻性观察性研究，涉及724例患者，他们于2015年10月至2017年2月在10所大学医院接受了结肠镜检查或结肠镜检查。

结果

 当结肠镜检查停药时间≥2时，在结肠的右侧，ADR（33.2％vs 13.7％，P <.001），PDR，锯齿状息肉检出率和每次结肠镜检查腺瘤数（APC）显着更高。分钟，而<2分钟。当近端结肠的撤药时间≥4分钟且结肠左段的撤药时间≥3分钟时，ADR，PDR和APC的撤药时间分别显着高于<4分钟和<3分钟。多因素分析显示，ADR与结肠右侧≥2分钟的撤药时间显着相关（赔率[OR]为2.98； 95％置信区间[CI]为1.72-5.15；P  <.001），在近端结肠中≥4分钟（OR，4.48; 95％CI，3.15-6.36; P <.001），并且在结肠左段≥3分钟（OR，2.92； 95％CI，1.74-4.91；P  <.001）。

结论

当停药时间在右侧结肠段≥2分钟，在近端结肠≥4分钟，在左侧结肠段≥3分钟时，PDR和ADR显着增加，而停药时间较短。