Reviewer’ s report
Title: Is body mass index associated with irregular menstruation: A questionnaire study?
Version: 0Date: 07 Jun 2020
Reviewer: Peter of Gichangi
Reviewer's report:
This questionnaire study was performed in The Hospital .. what do the authors mean by
questionnaire study? They should specify the specific study design used.
There was no patient and public involvement in this study. - what does this mean yet human
subjects were involved?
A total of 1100 women who came to our hospitals for health examination were asked to complete
a questionnaire. - this suggests a selected population of women. How likely is that this populationrepresents Chines women?
All these women voluntarily completed the questionnaire. - was this self administered or research
assistant completed?
...weight and height.. were the participants expected to report their weight and height? From where
were they expected to get this report?
Therefore, in our current study, we divided the amount of menstrual blood loss into three groups,
light (less than 15pads used during menses), medium (15 to 20 pads used during menses) and
heavy (more than 21 pads used during menses) based on our gynaecologist's clinical experience -what was the basis of the categorisation of the pads used? Were the participants using the sametype of pads? How did use of different pads with different absorbent capacity controlled for?
BMI was calculated and classified according - this was calculated using the information
participants recorded in the questionnaires! Why was weight and height not measured yetparticipants came to hospital?
Table 2. The Chi-sqaure presented is testing what?The table as presented is not understandable!In contrast, the odds ratio of women with heavy menstrual blood loss in underweight women was
0.4034 (95%CL: 0.224, 0.725), compared to that in women withnormal weight (p=0.004). This result need to be presented differently. Table 3 title need to berevised appropriately. It is not Odds Ratio
Results shown in table 4 need to be controlled for different type of pads used.
Are the methods appropriate and well described?
If not, please specify what is required in your comments to the authors.
NoDoes the work include the necessary controls?
If not, please specify which controls are required in your comments to the authors.
No
Are the conclusions drawn adequately supported by the data shown?
If not, please explain in your comments to the authors.
NoAre 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 statisticsQuality of written English
Please indicate the quality of language in the manuscript:
Needs some language corrections before being published
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