Review for 10.1186/s12876-020-01415-8 (2020)

Reviewer ’s report  
 
Title: Comparison of surgical outcomes between isolated p ancreaticojejunostomy, isolated 
gastrojejunostomy, and conventional pancreaticojejunostomy a fter pancreaticoduodenectomy: A 
systematic review and meta -analysis  
 
Version: 0 Date: 15 Jun 2020  
 
Reviewer's report:  
 
The following methodological issues should be corrected.  
 
- Please explain the approach to the unpublished data?  
 
- Please elaborate more on the sensitivity and subgroup analyses in both Methods and Results?  
 
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 ad equately 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 recomm ended, 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 inte rests  
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 financially 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 
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 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 you r reply is yes to any, please give details below.  
 
I declare that I have no competing interests  
 
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