Review for 10.1186/s12876-020-01373-1 (2020)

Reviewer ’s report  
 
Title: Effect of Bowel Preparation Volume in Inpatient Colonoscopy. Results of a Prospective,  
Randomized, Comparative Pilot Study  
 
Version: 1 Date: 26 Apr 2020  
 
Reviewer: David kastenberg  
 
Reviewer's report:  
 
Please include all comments for the authors in this box rather than uploading your report as a n 
attachment. Please only upload as attachments annotated versions of manuscripts, graphs, 
supporting materials or other aspects of your report which cannot be included in a text format.  
Please overwrite this text when adding your comments to the authors.  
 
The authors have done a nice job addressing the issues raised in the reviews. One further request 
- please remove brand names from the abstract and text other than in parentheses once in the 
methods so readers are clear as the purgatives being evaluated. Using an abbreviation such as 
PEG -ELS 4L, PEG -ELS/Asc 2L, etc. would be fine.  
 
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 comments 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 quality of language in the manuscript:  
 
Acceptable  
 
Declaration of competing interests  
Please complete a declaration of competing interests, considering the following questions:  
 
1. Have you in the past five years received reimbursements, f ees, funding, or salary from an 
organisation that may in any way gain or lose financial ly from the publication of this 
manuscript, either now or in the future?  
 
2. Do you hold any stocks or shares in an organisation t hat may in any way gain or lose 
financially from the publication of this manuscript, either now or in the futu re? 
 
3. Do you hold or are you currently applying for any patents  relating to the content of the 
manuscript?  
 
4. Have you received reimbursements, fees, funding, or salary from an organization 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?  
 
If you can answer no to all of the above, write 'I declare that I have  no competing interests' 
below. If your reply is yes to any, please give details below.  
 
1) Ferring - advisory board2) Salix - advisory board3) Med tronic - consultant4) MotusGI -
research, advisory board  
 
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on my report to the authors and, if the manuscript is accepted f or publication, my named report 
including an y attachments I upload will be posted on the website along with the authors' 
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which I do not wish to be included in my named report can be in cluded as confidential comments 
to the editors, which will not be published.  
 
I agree to the open peer review policy of the journal