Review for 10.1186/s12876-019-1111-0 (2019)

Reviewer ’s report  
 
Title: Ileal intubation is not associated with higher detection r ate of right -sided conventional 
adenomas and serrated polyps compared to cecal intubation after  adjustment for overall adenoma 
detection rate  
 
Version: 0 Date: 17 Jun 2019  
 
Reviewer: Miroslaw Szura  
 
Reviewer's report:  
 
Continuous improvement in the quality of colonoscopic examination, expressed in ADR, PDR, 
CIT and CIR, requires research that determines the factors affecting the above indicat ors. The 
endoscopist's experience, the withdrawal times and the quality of bowel preparation for 
colonoscopy are essential. Due to the lack of data, these important parameters were not included 
in the work. It is suspected that more experienced endoscopes also had higher ADR ( &gt; 25) 
and probably they were more likely to intubate the ileum. Is all patients required intubation of 
the ileum during colonoscopy? Probably part of the endoscopists ended the examination after 
intubation of the caecum because ther e was no obligation to assess the ileum. Interesting is the 
dependence of intubation of the small intestine on the ADR level of endoscopists. The 
assessment of the quality of bowel cleansing for the exam is poor, because it refers to the entire 
colon, not to its proximal part, which is usually less well prepared.  
 
Taking into account my doubts, I believe that the research has been well carried out and the 
conclusions are correct.  
 
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the authors.  
 
Yes 
 
Does the work include the necessary controls?  
If not, please specify which controls are required in your com ments to the authors.  
 
Yes 
 
Are the conclusions drawn adequately supported by the data shown?  
If not, please explain in your comments to the authors.  
 
Yes 
 
Are you able to assess any statistics in the manus cript or would you recommend an 
additional statistical review?  
If an additional statistical review is recommended, please speci fy what aspects require further 
assessment in your comments to the editors.  
I am able to assess the statistics  
 
Quality of written English  
Please indicate the qua lity of language in the manuscript:  
 
Acceptable  
 
Declaration of competing interests  
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that holds or has  applied for patents relating to the content of the manuscript?  
 
5. Do you have any other financial competing interests?  
 
6. Do you have any non -financial competing interests in relation to this paper?  
 
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below. If your reply is yes to any, please give details below.  
 
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