Review for 10.1186/s12876-020-01562-y (2020)

Reviewer’s report
Title: 
Development and Validation of the Peptic Ulcer Scale under the System
of Quality of Life Instruments for Chronic Diseases based on Classical Test
Theory and Generalizability Theory
Version: 
0 
Date: 
30 Sep 2020
Reviewer: 
Khaled Farid
Reviewer's report:
In this work the authors develop and validate a special QOL instrument QLICD-
PU for peptic ulcer disease using a method that combines a general module with
a specific module for a specific disease. It can be used as a useful tool for
assessing the quality of life of patients with PUD, with good psychometric
characteristics.
It is an interesting report; the aim is obvious, the work is sufficient to achieve the
aim with clear conclusion.
Generally, language should be revised regarding grammar and punctuation.
It is better to spill out abbreviations when you first use them.
Abstract:
Spell out abbreviations when used for the first time e.g G and D, SF-36…..
Background:
Generally, Language revision regarding grammar and punctuation is needed.
Page 5
Line 11-30: statements are repeated and need adjustment.
Methods:
Page 7
Line 9: on the second or second??
Line14: Besides, there is no…..what does this means here?
Line 55: (r) not r
Page 8
Line 9: item…. extra word??
Line 25: (SRM)…??
Page 9
Line 14-17: statements are repeated.
Line 17: [person-by-item (p × i) design] …separate statement?...Punctuation.
References:
Reference 1 and 2 written in a non-uniform pattern to others.
Tables:
Abbreviations should be described with each table.
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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?
Yes
Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
Yes