Reviewer’s report
Title: 
The relationship of severity in diastasis recti abdominis and pelvic floor
dysfunction: a retrospective cohort study
Version: 
0 
Date: 
14 Jan 2021
Reviewer's report:
This research is a retrospective cohort study of the relationship between DRA
and PDF. It proved the relationship of DRA and PDF is no connective. This is an
interesting finding that provides an important complement to the diagnosis of
PDF. However, there are still some areas of this article that need to be revised
and supplemented.
1. Abbreviations should be defined at first mention and should be used
consistently thereafter. Please recheck and modify the abbreviation below. Such
as -POP (line 25); -pelvic floor muscles/pelvic floor muscle strength: PFMs (line
56 and 208)
2. Measurements were made using ultrasound. I suggest that detailed ultrasound
parameters and operating details should be added
3. How should we understand " The data showed that the incidence of UI and
lumbago or dorsalgia are almost same." in the section of results (line 203). I
think it is necessary to add this part to the discussion part.
4. The description of the statistics part is not detailed enough. You have to
mention about the analysis for nonparametric parameter and logistic regression
analysis in detail. I think that "age" and "height" have to be include as
independent variables for contributing to DRA.
5. In the section of method, why you use the method of manual muscle test to
measure the strength of rectus abdominal muscles. It reduced the reliability, even
you discuss this limitation in section of discussion. 
6. In this study, you just took consideration on UI and POP. I suggest you to
reconsider the expression below. (Line 246-247).
"The finding of this study indicated there was no statistical difference in
relationship of DRA and PFD"
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Is the study design appropriate to answer the research question (including the use
of appropriate controls), and are the conclusions supported by the evidence
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