Review for 10.1186/s12876-019-1086-x (2019)

Reviewer ’s report  
 
Title: Unique characteristics of CpG island methylator phenotype (CIMP) in a Chinese 
population  
with colorectal cancer  
 
Version: 0 Date: 23 Jul 2019  
 
Reviewer: Chu-Kuang Chou  
 
Reviewer's report:  
 
The stu dy offers the molecular characteristics of colorectal cancer (CRC) in Chinese population. 
The authors find a significantly low BRAF mutation, low KRAS mutation and low incidence of 
CIMP -high in our CRC population. The molecular epidemiologic information is  needed to know 
the Chinese CRC populations.  
1. The result 1 and table 1 mentioned the study include stage I, II, III CRC. In table 2, we 
can see stage IV subjects. Please clarify this.  
Are the methods appropriate and well described?  
If not, please s pecify 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 sh own?  
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 aspect s 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, fees, funding, or salary from an  
organisation that may in any way gain or lose financially from the publi cation of this  
manuscript, either 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 curr ently 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.  
 
I declare that I have no competing interests.  
 
I agree to the open peer review policy of the journal. I understand that my name will be included  
on my report to the authors and, if the manuscript is accepted for publication, my named rep ort 
including any attachments I upload will be posted on the website along with the authors'  
responses. 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/ ). I understa nd that any comments  
which I do not wish to be included in my named report can be included as confidential comments  
to the editors, which will not be published.  
 
I agree to the open peer review policy of the journal