Review for 10.1186/s12876-020-01193-3 (2020)

Reviewer ’s report  
 
Title: Prevalence, associated factors and medication for sympt oms related to gastroesophageal 
reflux disease among 1114 private -tuition students of Anuradhapura, Sri Lanka  
 
Version: 1 Date: 23 Oct 2019  
 
Reviewer: Siavosh Nasseri -Moghaddam  
 
Reviewer's report:  
1) Page 6, line 1 4: "students were to be 18 years and older to be eligible for the study". Page 
11, line 5: "The mean age of the participants was 19.1 (SD 1.02) years with a range of 17 to 27 
years". These are contradictory.  
2) Page 7, lines 17 &amp;  18: It is not clear wh at does a "GORD score of 1495" mean and 
how is it calculated? Such a score has not been explained in the text prior to that. Similar 
problem with figure -1 (which also has not a title).  
3) These sentences:" Pearson (95% confidence interval) correlation for the GORD scores 
against the age of the participants was 0.057 ( -0.002 to 0.115). Regression o 1 f the GORD score 
against the age of the participants had no significance (P = 0.059)" are rather vague.  
4) In the results section, it is recommended that the r esults of univariate analysis be 
mentioned first and then the regression analysis results be presented.  
 
 
 
Are the methods appropriate and well described?  
If not, please specify what is re quired 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.  
 
Unable to assess  
 
Are the conclusions drawn adequately supported by the data shown?  
If not, plea se explain in your comments to the authors.  
 
Unable to assess  
 
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 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:  
 
Needs some language corrections before being published  
 
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 publicat ion 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 current ly 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 ot her 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 giv e details below.  
 
I declare that I have no competing interests.  
 
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