Reviewer ’s report  
 
Title: Age at mena rche and prevention of hypertension through lifestyle in young Chinese adult 
women: result from Project ELEFANT  
 
Version: 0 Date: 27 Aug 2018  
 
Reviewer: Prasanna Mithra  
 
Reviewer's report:  
 
The autho rs have addressed an important Public Health issue.  
However the study design is not specified whether it is a cross sectional study nested or a case 
control study nested on to the original cohort.  
Also the analysis part specifies multivariable logistic r egression. But the tables and figures need 
to be specified it is adjusted OR that is put up.  
Tables need revision. The "%" symbol is unnecessarily repeated many times in Table 1 and 2. 
That could be mentioned in the header and make it look more neat and e asy to look at.  
 
Lines 115 to 119 read "The total number of participants within Young ELEFANT is 124286 
(50% male). The participants are living in Tianjin city who visited clinics in Tianjin between 
2014 and 2015 for regular check -ups, therefore there was  no selection bias which can be 
potentially caused by highly sensitive reproductive medical records. Basic demographic and 
clinical characteristics were collected through" This is not clear and has to be elaborately 
justified as to why the bias is less  
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the authors.  
 
Yes 
 
Does the work include the necessary controls?  
If not, please specify which controls are required in your comments to the authors.  
 
Unable to assess  
 
Are 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 further  
assessment 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:  
 
Acceptable  
 
Declaration of competing interests  
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