Review for 10.1186/s12876-018-0779-x (2018)

Reviewer ’s report  
 
Title: Systematic review of the relationship of Helicobacter pylori infection with geographical 
latitude, average annual temperature and average daily sunshin e 
 
Version: 0 Date: 07 Feb 2018  
 
Reviewer: Raja Affendi Raja Ali  
 
Reviewer's report:  
 
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The title needs to re arrange..for eg Systemic review of ... Please avoid using twice :  
This is a first study attempting the to investigate the relationship  between hp and latitude, 
temperature and daily sunshine.  
Why the researchers decide to search articles from Jan 2000? There many publications with 
regards to HP prior to that year. Please explain  
As Hp is a predominant disease in Asia (and in China alone up to 70% have Hp), perhaps authors 
can sub analyze within Asian countries to look at any specific findings let say any north south 
gradient, dietary, environment, climate etc .  
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?  
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Yes 
 
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 reco mmend 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  
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