Review for 10.1186/s12876-020-01292-1 (2020)

Reviewer ’s report  
 
Title: GASTROESOPHAGEAL REFLUX DISEASE: PREVALENCE AND EXTRAOESO -
PHAGEAL MANIFESTATIONS AMONG UNDERGRADUATE STUDENTS IN SOUTH  
WEST NIGERIA  
 
Versi on: 2 Date: 27 Jan 2020  
 
Reviewer: Etsuro Yazaki  
 
Reviewer's report:  
 
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This manuscript investigated the prevalence of GOR symptoms and its extra oesophageal 
manifestations in Nigeria. The number of subjects was high to assess statis tical significance , and 
peer reviewed questionnaires were used. However, they did not use either endoscopy (although 
the reason was explained in the manuscript) nor pH/MIIpH monitoring to confirm GOR disease, 
which was a significant lack of clinical/scien tific evidence of GORD.  
 
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the authors.  
 
No 
 
Does the work include the necessary co ntrols?  
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.  
 
No 
 
Are you able to assess any statisti cs 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.  
 
Not relevant to this manuscript  
 
 
Quality of written English  
Please indicate the quality of language in the manuscript:  
 
Acceptable  
 
Declaration of competing interests  
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holds or has applied for patents relating to the content of the manuscript?  
5. Do you have any other financial competing interests?  
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