Review for 10.1186/s12876-021-01621-y (2021)

Reviewer’s report
Title: 
Using Item Response Theory (IRT) to Improve the Efficiency of the
Simple Clinical Colitis Activity Index (SCCAI) for patients with ulcerative
colitis
Version: 
0 
Date: 
19 Oct 2020
Reviewer's report:
Abstract and Introduction edits /comments as suggested
Methods - minor changes
Results - include some graphics 
Discussion - additions suggested
Conclusion needs to be more realistic 
All changes suggested in pdf annotations as attached
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Is the study design appropriate to answer the research question (including the use
of appropriate controls), and are the conclusions supported by the evidence
presented?
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Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
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