Review for 10.1186/s12876-020-01360-6 (2020)

Reviewer ’s report  
 
Title: Associati on Between Charlson Comorbidity Index and Complications of Endoscopic  
Resection of Gastric Neoplasms in Elderly Patients  
 
Version: 1 Date: 17 Jun 2020  
 
Reviewer's report:  
 
Thank you for your response.The manuscript was well revised according to reviewer's 
comments.  
 
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the authors.  
 
Yes 
 
Does th e 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 manuscript or would you recommend an  
additional statistical review?  
If an additional statistical review is recommended, please specify 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:  
 
Needs some language corrections before being published  
 
Declaration of competing interests  
Please complete a declaration o f competing interests, considering the following questions:  
 
1. Have you in the past five years received reimbursements, fees, funding, or salary from an  
organisation that may in any way gain or lose financially from the publication of this  
manuscript, eith er now or in the future?  
 
2. Do you hold any stocks or shares in an organisation that may in any way gain or lose  
financially from the publication of this manuscript, either now or in the future?  
 
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 inte rests?  
 
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.  
 
I declare that I have no competing interests.  
 
Reviewer Publication Consent. I agree for my report to be made available under an Open 
Access  Creative Commons CC -BY License ( http://creativecommons.org/licenses/by/4.0 ) if this 
manuscript  is accepted for publication. Any comments that I do not wish to be included in the 
published  report have been included as confidential comments to the editor, which will not be 
published.  If you are not happy for us to publish this report, please contact the editorial office 
before completing  the review . If you wish, you can include your name in your published report. 
Please note you must  decide whether to include your name at the start of the process and confirm 
this decision whenever  prompted. If you change your decision later, we will not be able to 
publish your name.  
 
I agree to the terms of the CC -BY 4.0 license; please do not publish my name with my report.  
(default)  
 
Publons Reviewer Recognition . Springer Nature can send verification of this review directly to  
Publons (a subsidiary of Clarivate Analyt ics). If you would like to take advantage of this service,  
please click on the “Yes” option below. Your name, email address, title of the reviewed  
manuscript, name of the journal, and date of your review submission (the “Review Data ”) will  
then be transmitted to Publons upon publication of the manuscript. If you have already registered  
at Publons, they will notify you of the receipt of this review and update your profile as per your  
settings and their policy. If you are not registered with P ublons, you will receive an email from  
them asking you to register in order for them to be able to recognize your review on your new  
profile page. Publons may use the Review Data to generate derivative metadata for the benefit of  
Publons and you as a revie wer, carefully considering the sensitivity of such information. For  
example, Publons may verify your record as a reviewer by updating your profile published on its  
webservice if you have registered for such service or help editors to identify candidate rev iewers.  
Please find the details of processing in Publons ’ privacy policy https://publons.com/about/terms  
 
No