Review for 10.1186/s12876-021-01665-0 (2021)

Reviewer’s report
Title: 
Instrument to evaluate the knowledge of patient with cirrhosis on his
disease: construction and validity
Version: 
1 
Date: 
27 Jan 2021
Reviewer's report:
The work may have practical applications but I still cannot be sure that because
the instrument was not examined in clinical experiments. 
1 CVI is the most widely used index in quantitative evaluation. There are 2 kinds
of CVI: I-CVI and S-CVI. 
2 The authors are hoped to provide the content validity consisting of I-CVI and
S-CVI, respectively. I am wondering whether the validity evaluation of
instrument should be evaluated using enough data from related manuscripts or
the experts provided the related data as supporting information but not only the
statistical result.
3 There are some instruments for assessing the knowledge of patients. Can the
authors use one of them as a control ?
Some errors
Qualitative Analysis was repeatedly described from P6 lines1-15 to P6 lines 48-
59 and P7 lines 1-2.
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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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from apparent manipulation?
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