Review for 10.1186/s12876-021-01618-7 (2021)

Reviewer’s report
Title: 
Development and validation of a Novel Competing Risk Model for
Predicting Survival of Esophagogastric Junction Adenocarcinoma: a SEER
population-based study and external validation
Version: 
0 
Date: 
25 May 2020
Reviewer's report:
The authors 
demonstrated a the competing risk nomogram showed the greater
accurate individualized prediction of the survival compared with traditional
TNM classification,based on the SEER database with AEG patients.Overall,it is
a well-written manuscript.However, some issues should be elaborated:
1.The authors mentioned the specific characteristis of AEG, while the parameters
in this nomogram seem it also can apply to all GC. Thus, the authors should
reanalyze the SEER data to confirm the range of their model.Also, a stratifed
analysis with different AEG type should be added.
2.It is better to perform a validation, as concern by lack of variety of information
in SEER.
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.
No
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:
Acceptable
Declaration of competing interests
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questions:
1
. 
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salary from an organisation that may in any way gain or lose financially
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or in the future?
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Do you hold or are you currently applying for any patents relating to the
content of the manuscript?
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Have you received reimbursements, fees, funding, or salary from an
organization that holds or has applied for patents relating to the content of
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Do you have any other financial competing interests?
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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' below
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