Review for 10.1186/s12876-020-01376-y (2020)

Reviewer’ s report
Title: Cholecystectomy outcomes after endoscopic sphincterotomy in patients with choledocho-
lithiasis: A meta-analysis
Version: 1Date: 28 Dec 2019
Reviewer: Kook Hyun Kim
Reviewer's report:
Thank you for your intensive study about meta-analysis of cholecystectomy outcomes after EST.
It is very informative and it shows the summary of positive effects of post ERCP cholecystectomy.However, it seems that there are several things to be clarified for readers to understand the meta-analysis to some extent more clearly. Here are something to be specified.1. at abstract section, line 39, in the gallbladder group should be changed into the "gallbladderresected group".2. The uploaded figures are not clear at the PDF version. Therefore, I cannot read the figuresclearly.
Could you upload the tables and figures again to see clearly?
3. at page 6, line 37 and line 44, what do [?] mean ?4. at Results section of page 6, line 32, does the gallbladder group mean "the gallbladder resectedgroup" ? please, clarify the group name and use the same name in the whole manuscript in ordernot to be confused, such as: gallbladder resection group, cholecystectomy group, resection group,post-operative resection (at page 7, line 8)5. at Discussion section of page 7, line 38, the wait -and -see procedure versus cholecystectomy ishard to understand. Do you mean that "wait-and-see group, compared with cholecystectomy" ? It
should be clarified on the manuscript.
6. at Discussion section of page 7, line 33, This study compared the effect of cholecystectomy~~to make it clear the meaning, it might be changed into " This study analyzed the effect of ~~ ".7. What is the definition of low and high risk groups at the page 6, line 2-3. ?
Are the methods appropriate and well described?
If not, please specify what is required in your comments to the authors.
YesDoes the work include the necessary controls?
If not, please specify which controls are required in your comments to the authors.
YesAre 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 furtherassessment 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:
AcceptableDeclaration of competing interests
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