Review er’s report  
 
Title: Determinant of Time -to-First Birth Interval after Marriage among Ethiopian women  
 
Version: 0 Date: 17 Mar 2019  
 
Reviewer: Mehrnoosh Akhtari -Zavare  
 
Reviewer's report:  
Determinant of Time -to-First Birth Interval after Marriage among Ethiopian woman, using a 
parametric shared frailty survival models (BMWH -D-19-00066)  
 
Thank you for the opportunity to review this interesting and useful paper. I recommend some 
changes to improve the manuscript which are as follows:  
 
1. In introduction, last sentences of first paragraph and first sentences of second paragraph 
has the same meaning, please correct it.  
 
2. Why author interested to find determinant of time to first birth interval in Ethiopia? What 
is the significant of finding this issue? Is any effect on marriage, if women get pregnant after 2 -3 
years after marriage? Please, m ore explain about culture or maybe religious (if author think has 
effect), so reader can get idea about Ethiopian people…  
 
3. What is inclusion and exclusion criteria for EDH survey?  
 
4. How they choose households (sampling method)  
 
5.  what is the contents o f interview (create create the table for it)  
 
6. Please write out the full word with the acronym in parentheses afterwards (EAs, AIC, 
FBI,… )  
7. Most of the finding which you find in this study already in another study like () found it, 
or we know that "Tim e-to-first birth interval following marriage for employed women was 
longer than unemployed women",… I means what the point or difference between this study and 
previous study?  
 
8. In discussion part of for "A significant association was found between woman education 
and time -to-first birth", author mention about "The limitation of this study is using a secondary 
data set, future studies using a data collected prospectively is warranted", please more explain 
why author think secondary data had effect on this finding?  
 
9. What is limitation and strength of this study  
 
10. How about ethical committee and consent form f or this study  
 
I hope that this information is useful to the editors and authors. Finally, to draw a conclusion, I 
believe the authors should do th e above major corrections before you publish it.  
 
 
Are the methods appropriate and well described?  
If not, please specify wha t is required in your comments to the authors.  
 
No 
 
Does the work include the necessary controls?  
If not, please specify which controls are required in your comments to the authors.  
 
Yes 
 
Are the conclusions drawn adequately supported by the data shown?  
If not , please explain in your comments to the authors.  
 
No 
 
 
 
Are you able to assess any statistics in the manus cript or would you recommend an 
additional statistical review?  
If an additional statistical review is recommended, please specify what aspects require fu rther 
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  
Please complete a declaration of competing interests, considering the following questions:  
1. Have you in the past five years received reimbursements, f ees, funding, or salary from an 
organisation that may in any way gain or lose financially from the publi cation of this 
manuscript, either now or in the future?  
 
2. Do you hold any stocks or shares in an organisation t hat may in any way gain or lose 
financially from the publication of this manuscript, either now or in the future?  
 
3. Do you hold or are you curr ently applying for any patents  relating to the content of the 
manuscript?  
 
4. Have you received reimbursements, fees, funding, or salary from an organization that 
holds or has applied for patents relating to the content of the manuscript?  
 
5. Do you have any  other financial competing interests?  
 
6. Do you have any non -financial competing interests in relation to this paper?  
 
If you can answer no to all of the above, write 'I declare that I have  no competing interests' 
below. If your reply is yes to any, please give details below.  
 
no conflicts of interest  
 
I agree to the open peer review policy of the journal. I understan d that my name will be included 
on my report to the authors and, if the manuscript is accepted f or publication, my named report 
including any att achments I upload will be posted on the website along with the authors' 
responses. I agree for my report to be made available under an Open Access Creative Commons  
CC-BY license ( http://creativecommons.org/licenses/by/4.0/ ). I understand that any comments 
which I do not wish to be included in my named report can be in cluded as confidential comments 
to the editors, which will not be published.  
 
I agree to the open peer review policy of the journal