Reviewer's report
 Helicobacter pylori (H pylori) infection in South-East Europe: the changing prevalence during a Title:
ten-year period and its antigenic profile.
Authors:
Periklis Apostolopoulos (periklisapo@yahoo.com )
Irene Vafiadis (i.vafiadis@grmedia.gr )
Michael Tzivras (pola@med.uoa.gr )
Dimitrios Kourtessas (akorba@med.uoa.gr )
Nicolaos Katsilambros (laennec@techlink.gr )
Athanasios Archimandritis (aarchim@hotmail.com )
 2  20 Feb 2002 Version: Date:
 Dr Angel Lanas Reviewer:
 A paper of limited interest Level of interest:
 Accept after discretionary revisions Advice on publication:
I have reviewed the revised manuscript and found that it has improved. I feel comfortable with the 
response given to the most part of my criticisms. 
However I think that the statistical section of Methods should be improved. Authors have not added anything new and I believe that they should include the calculations they made in order to estimate the sample size. Three tables are focused on logistic regression analysis, but the authors do not provide 
any description of how these analysis were performed. 
Competing interests:
None declared.
Reviewer's report
 Helicobacter pylori (H pylori) infection in South-East Europe: the changing prevalence during a Title:
ten-year period and its antigenic profile.
Authors:
Periklis Apostolopoulos (periklisapo@yahoo.com )
Irene Vafiadis (i.vafiadis@grmedia.gr )
Michael Tzivras (pola@med.uoa.gr )
Dimitrios Kourtessas (akorba@med.uoa.gr )
Nicolaos Katsilambros (laennec@techlink.gr )
Athanasios Archimandritis (aarchim@hotmail.com )
 2  20 Feb 2002 Version: Date:
 Dr Angel Lanas Reviewer:
 A paper of limited interest Level of interest:
 Accept after discretionary revisions Advice on publication:
I have reviewed the revised manuscript and found that it has improved. I feel comfortable with the 
response given to the most part of my criticisms. 
However I think that the statistical section of Methods should be improved. Authors have not added anything new and I believe that they should include the calculations they made in order to estimate the sample size. Three tables are focused on logistic regression analysis, but the authors do not provide 
any description of how these analysis were performed. 
Competing interests:
None declared.
Please review this paper.
user
Reviewer's report
 Helicobacter pylori (H pylori) infection in South-East Europe: the changing prevalence during a Title:
ten-year period and its antigenic profile.
Authors:
Periklis Apostolopoulos (periklisapo@yahoo.com )
Irene Vafiadis (i.vafiadis@grmedia.gr )
Michael Tzivras (pola@med.uoa.gr )
Dimitrios Kourtessas (akorba@med.uoa.gr )
Nicolaos Katsilambros (laennec@techlink.gr )
Athanasios Archimandritis (aarchim@hotmail.com )
 2  20 Feb 2002 Version: Date:
 Dr Angel Lanas Reviewer:
 A paper of limited interest Level of interest:
 Accept after discretionary revisions Advice on publication:
I have reviewed the revised manuscript and found that it has improved. I feel comfortable with the 
response given to the most part of my criticisms. 
However I think that the statistical section of Methods should be improved. Authors have not added anything new and I believe that they should include the calculations they made in order to estimate the sample size. Three tables are focused on logistic regression analysis, but the authors do not provide 
any description of how these analysis were performed. 
Competing interests:
None declared.
assistant