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      International Journal of COPD (submit here)

      This international, peer-reviewed Open Access journal by Dove Medical Press focuses on pathophysiological processes underlying Chronic Obstructive Pulmonary Disease (COPD) interventions, patient focused education, and self-management protocols. Sign up for email alerts here.

      39,063 Monthly downloads/views I 2.893 Impact Factor I 5.2 CiteScore I 1.16 Source Normalized Impact per Paper (SNIP) I 0.804 Scimago Journal & Country Rank (SJR)

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      The Reliability and Validity of the Brief ICF Core Set in Patients with Chronic Obstructive Pulmonary Disease

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          Abstract

          Purpose

          To analyze the reliability and validity of the Brief international classification of functioning, disability and health (ICF) core set for chronic obstructive pulmonary disease (COPD).

          Patients and Methods

          A cross-sectional study was conducted in four tertiary hospitals in Tianjin, China. A total of 100 patients with COPD were selected to evaluate functioning and disability involving body functions, body structures, activities and participation as well as environmental factors of the Brief ICF core set for COPD. Internal consistency was calculated by Cronbach’s α. Content validity was examined using the content validity index (CVI), scale-level CVI/universal agreement, and scale-level CVI/average agreement (S-CVI/Ave). In addition, construct validity and convergent validity were also examined.

          Results

          The Brief ICF core set for COPD had a high internal consistency, 0.873 for the total scale, with values of 0.750, 0.640, and 0.843 for body functions, body structures, and activity and participation, respectively. The content validity was calculated by the CVI, scale-level CVI/universal agreement, and S-CVI/Ave at values of 0.80–1, 0.929, and 0.986, respectively. Meanwhile, the ICF core set for COPD had good convergent validity, correlating with the mMRC dyspnea score (r=0.690, P<0.01), and there were significant correlations between the ICF core set for COPD and COPD clinical severity grade (r=0.363, P<0.01). A four-factor model of functions and disability in the Brief ICF core set for COPD had the best fit according to confirmatory factor analysis (CFA).

          Conclusion

          The Brief ICF core set for COPD is a reliable and valid convenient instrument for assessing comprehensive problems in the functioning of patients with COPD, which can be used to design and to evaluate rehabilitation strategies.

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          Most cited references41

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          Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives

          Li‐tze Hu, Peter M. Bentler (1999)
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            Correlation Coefficients

            Patrick Schober, Christa Boer, Lothar A Schwarte (2018)
            Correlation in the broadest sense is a measure of an association between variables. In correlated data, the change in the magnitude of 1 variable is associated with a change in the magnitude of another variable, either in the same (positive correlation) or in the opposite (negative correlation) direction. Most often, the term correlation is used in the context of a linear relationship between 2 continuous variables and expressed as Pearson product-moment correlation. The Pearson correlation coefficient is typically used for jointly normally distributed data (data that follow a bivariate normal distribution). For nonnormally distributed continuous data, for ordinal data, or for data with relevant outliers, a Spearman rank correlation can be used as a measure of a monotonic association. Both correlation coefficients are scaled such that they range from -1 to +1, where 0 indicates that there is no linear or monotonic association, and the relationship gets stronger and ultimately approaches a straight line (Pearson correlation) or a constantly increasing or decreasing curve (Spearman correlation) as the coefficient approaches an absolute value of 1. Hypothesis tests and confidence intervals can be used to address the statistical significance of the results and to estimate the strength of the relationship in the population from which the data were sampled. The aim of this tutorial is to guide researchers and clinicians in the appropriate use and interpretation of correlation coefficients.
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              The content validity index: are you sure you know what's being reported? Critique and recommendations.

              Denise Polit, Cheryl Beck (2006)
              Scale developers often provide evidence of content validity by computing a content validity index (CVI), using ratings of item relevance by content experts. We analyzed how nurse researchers have defined and calculated the CVI, and found considerable consistency for item-level CVIs (I-CVIs). However, there are two alternative, but unacknowledged, methods of computing the scale-level index (S-CVI). One method requires universal agreement among experts, but a less conservative method averages the item-level CVIs. Using backward inference with a purposive sample of scale development studies, we found that both methods are being used by nurse researchers, although it was not always possible to infer the calculation method. The two approaches can lead to different values, making it risky to draw conclusions about content validity. Scale developers should indicate which method was used to provide readers with interpretable content validity information. (c) 2006 Wiley Periodicals, Inc.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Int J Chron Obstruct Pulmon Dis
                Journal ID (iso-abbrev): Int J Chron Obstruct Pulmon Dis
                Journal ID (publisher-id): copd
                Journal ID (pmc): copd
                Title: International Journal of Chronic Obstructive Pulmonary Disease
                Publisher: Dove
                ISSN (Print): 1176-9106
                ISSN (Electronic): 1178-2005
                Publication date (Electronic): 15 July 2021
                Publication date Collection: 2021
                Volume: 16
                Pages: 2077-2087
                Affiliations
                [1 ]School of Nursing, Tianjin Medical University , Tianjin, People’s Republic of China
                [2 ]Department of Respiratory Care, General Hospital of Tianjin Medical University , Tianjin, People’s Republic of China
                [3 ]Department of Respiratory Care, Tianjin First Center Hospital , Tianjin, People’s Republic of China
                [4 ]Department of Cardiac Care, Tianjin Chest Hospital , Tianjin, People’s Republic of China
                Author notes
                Correspondence: Lan Wang School of Nursing, Tianjin Medical University , 22 Qi Xiang Tai Road, Heping District, Tianjin, 300070, People’s Republic of ChinaTel +86 22 83336913Fax +86 22 83336900 Email wangl0423@tmu.edu.cn
                [*]

                These authors contributed equally to this work

                Author information
                http://orcid.org/0000-0003-2554-5659
                http://orcid.org/0000-0002-0430-4138
                Article
                Publisher ID: 306410
                DOI: 10.2147/COPD.S306410
                PMC ID: 8289296
                PubMed ID: 34290501
                SO-VID: 7493d6d5-abff-446b-82ff-a6cda6731501
                Copyright © © 2021 Zhang et al.
                License:

                This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License ( http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms ( https://www.dovepress.com/terms.php).

                History
                Date received : 12 February 2021
                Date accepted : 19 April 2021
                Page count
                Figures: 2, Tables: 10, References: 41, Pages: 11
                Funding
                Funded by: National Natural Science Foundation of China, open-funder-registry 10.13039/501100001809;
                This work was funded by grants from the National Natural Science Foundation of China (Grant no 71804125).
                Categories
                Subject: Original Research

                ScienceOpen disciplines: Respiratory medicine
                Keywords: international classification of functioning,disability and health,chronic obstructive pulmonary disease,reliability,validity
                Data availability:
                ScienceOpen disciplines: Respiratory medicine
                Keywords: international classification of functioning, disability and health, chronic obstructive pulmonary disease, reliability, validity

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