Review for 10.1186/s12876-018-0765-3 (2018)

Reviewer ’s report  
Title: Recurrent common bile duct stones as a late complication of endoscopic sphincterotomy  
 
Version: 1 Date: 29 Nov 2017  
 
Reviewer: Engida Abebe  
 
Reviewer's report:  
Overall it is a well written manuscript. Congratulations to the authors.  
the following minor comments need to be considered  
 
1. Result = Th ere were 724 female patients (63%) and 424 male patients (37%).( This is know by 
default - better you show sex ratio)  
2. Result =  Consequently, the presence of a type A diverticulum  
was associated with a statistically significant higher rate of primary C BDS recurrence, with a RR 
of 2.3.====  if RR is relative risk  it is not the write statistics . in reterospective study better to 
use OR. Similar comments in the other sites where RR was used  
3. Discussion= the need for open CBD exploration and enterohepat ic (choledochodoudenostomy 
)in patients with CBD diameter of >15mm can make comparison of different options of 
management complete  
 
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the a uthors.  
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 t he 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, fees, 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 publicatio n 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 intere sts' 
below. If your reply is yes to any, please give details below.  
 
i have nothing to declare  
 
I agree to the open peer review policy of the journal. I understand t hat my name will be included 
on my report to the authors and, if the manuscript is accepted for publication, my named report 
including any attachments I upload will be posted on the website along with the authors' 
responses. I agree for my report to be mad e available under an Open Access Creative Commons 
CC-BY license ( http://creativecommons.org/licenses/by/4.0/ ). I understand that any comments 
which I do not wish to be included in my named report can be included as confidential comments 
to the editors, whi ch will not be published.  
 
I agree to the open peer review policy of the journal