Reviewer’s report
Title: 
Trend Changes and Factor Analysis of Endometrial Hyperplasia in
Patients with Polycystic Ovarian Syndrome Based on the Korean National
Health Insurance Database
Version: 
0 
Date: 
01 Dec 2021
Reviewer's report:
The authors have conducted a retrospective population study in Korea regarding
the incidence of PCOS and EH. As the national database covers almost all
people in the country it is a very nice way to study the relationship between
PCOS and EH. Overall the manuscript is well written. 
Comments: 
The respective p-values should be included in the results section of the
manuscript. 
The discussion summarizes the data but does not bring it sufficiently into context
with previously published results from other countries. Therefore the discussion
should be augmented.
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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
presented?
Yes
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Yes
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Yes
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Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
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