Review for 10.1186/s12876-020-01462-1 (2020)

Reviewer’ s report
Title: Analysis of Risk Factor for Anastomotic Leakage after Lower Rectal Cancer Resection,
Including Drain Type: A Retrospective Single-Center Study
Version: 1Date: 15 Mar 2020
Reviewer: Deeksha Kapoor
Reviewer's report:
The authors have tried to answer a relevant question, as to which type of drainage is better in low
anterior resection.However, I feel there are certain aspects that need to be addressed more clearly.
1. The title of the article can be modified to be more specific - addressing the kind of drains, if they
affect post LAR anastomotic leaks2. Are drains placed in all cases of LAR in the institute?3. Are diversion ileostomies done in all cases ?4. It would be better to define what the authors call LAR, super low AR and coloanal anastomosis5. How did the authors decide which patient would get a closed drainage and who would get anopen drainage6. How many of these leaks were clinically relevant ? Can consider classifying the leaks accordingto International study group of rectal cancer surgery7. Why were the leaks looked for? Is it a protocol to assess the anastomotic integrity in the post opperiod? and after how many days
Are the methods appropriate and well described?
If not, please specify what is required in your comments to the authors.
Unable to assessDoes 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.
YesAre 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 statisticsQuality of written English
Please indicate the quality of language in the manuscript:
Acceptable
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