Reviewer's report 
 Comparison of Morning versus Afternoon Cecal Intubation Rates Title: 
 1  7 February 2007 Version: Date: 
 Hans Herfarth Reviewer: 
Reviewer's report: 
General 
This is a well-written retrospective comparative analysis of colonoscopy completion rates in the morning 
and in the afternoon. 
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Major Compulsory Revisions (that the author must respond to before a decision on publication can be 
reached) 
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Minor Essential Revisions (such as missing labels on figures, or the wrong use of a term, which the author 
can be trusted to correct) The authors should incorporate the article by Sanaka et al. instead of the abstract (reference 17), which has been previously published in the Am J Gastroenterol. in 12/2006. 
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Discretionary Revisions (which the author can choose to ignore) 
 Accept after minor essential revisions What next?: 
 An article of importance in its field Level of interest: 
 Acceptable Quality of written English: 
 No, the manuscript does not need to be seen by a statistician. Statistical review: 
Declaration of competing interests: 
I declare that I have no competing interests 
Reviewer's report 
 Comparison of Morning versus Afternoon Cecal Intubation Rates Title: 
 1  7 February 2007 Version: Date: 
 Hans Herfarth Reviewer: 
Reviewer's report: 
General 
This is a well-written retrospective comparative analysis of colonoscopy completion rates in the morning 
and in the afternoon. 
------------------------------------------------------------------------------- 
Major Compulsory Revisions (that the author must respond to before a decision on publication can be 
reached) 
------------------------------------------------------------------------------- 
Minor Essential Revisions (such as missing labels on figures, or the wrong use of a term, which the author 
can be trusted to correct) The authors should incorporate the article by Sanaka et al. instead of the abstract (reference 17), which has been previously published in the Am J Gastroenterol. in 12/2006. 
------------------------------------------------------------------------------- 
Discretionary Revisions (which the author can choose to ignore) 
 Accept after minor essential revisions What next?: 
 An article of importance in its field Level of interest: 
 Acceptable Quality of written English: 
 No, the manuscript does not need to be seen by a statistician. Statistical review: 
Declaration of competing interests: 
I declare that I have no competing interests 
Please review this paper.
user
Reviewer's report 
 Comparison of Morning versus Afternoon Cecal Intubation Rates Title: 
 1  7 February 2007 Version: Date: 
 Hans Herfarth Reviewer: 
Reviewer's report: 
General 
This is a well-written retrospective comparative analysis of colonoscopy completion rates in the morning 
and in the afternoon. 
------------------------------------------------------------------------------- 
Major Compulsory Revisions (that the author must respond to before a decision on publication can be 
reached) 
------------------------------------------------------------------------------- 
Minor Essential Revisions (such as missing labels on figures, or the wrong use of a term, which the author 
can be trusted to correct) The authors should incorporate the article by Sanaka et al. instead of the abstract (reference 17), which has been previously published in the Am J Gastroenterol. in 12/2006. 
------------------------------------------------------------------------------- 
Discretionary Revisions (which the author can choose to ignore) 
 Accept after minor essential revisions What next?: 
 An article of importance in its field Level of interest: 
 Acceptable Quality of written English: 
 No, the manuscript does not need to be seen by a statistician. Statistical review: 
Declaration of competing interests: 
I declare that I have no competing interests 
assistant