Reviewer ’s report  
Title: Patterns of missing data in the use of the Endometriosis Symptom Diary  
 
Version: 0 Date: 30 Jun 2017  
 
Reviewer: Mukhri  B. Hamdan  
 
Reviewer's report:  
The authors described the objective of this paper well, aiming to look at the pattern of missing 
data.  
 
However the number of participants were small and the analysis of the defaulter were even 
smaller.  
This study has no proper  control to compare with maybe ESD vs  EIS.  
Too many speculation in this paper and should conclude the answer of the paper objective from 
the result.  
No clinical value was drawn and more towards subjective assumptions  
The analysis of defaulter should be a ccording to disease severity which not given in the 
manuscript.  
The author should follow up (by call or mail) the defaulter and ask the reason why they did not 
complete the questionnaire for the record. There so many reason for not jotting down the pain 
diary. 
 
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 controls?  
If not, please  specify which controls are required in your comments to the authors.  
No 
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 statistics in the manuscript or would you recommend an 
additional statistical review?  
If an additional statistical review is recommended, please speci fy what aspects require further 
assessment in your comments to the editors.  
Not relevant to this manuscript  
Quality of written Engli sh 
Please indicate the quality of language in the manuscript:  
Needs some language corrections before being published  
Declaration of competing interests  
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