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: 
12 Nov 2020
Reviewer's report:
An assessment by clinicians of the revised data reports to understand if they
agree that the statistical distillation maintains sufficient information.
Where questionnaires given to patients more than once to determine if the
responses were reproducible?
Is there data to show that 9 items is too many for regular and accurate patient
compliance?
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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?
Yes
Are the methods sufficiently described to allow the study to be repeated?
Yes
Is the use of statistics and treatment of uncertainties appropriate?
Yes
Is the presentation of the work clear?
No
Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
Yes