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Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition

PURPOSE: Insomnia is a frequent sleeping disorder in the general and clinical population. With an increasing proportion of health care services being provided as outpatient care, a short, valid and reliable tool is needed to identify insomnia in medical patients under outpatient care in Denmark. The...

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Autores principales: Dieperink, Karin Brochstedt, Elnegaard, Caroline Matilde, Winther, Bodil, Lohman, Anna, Zerlang, Ida, Möller, Sören, Zangger, Graziella
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7052094/
https://www.ncbi.nlm.nih.gov/pubmed/32124114
http://dx.doi.org/10.1186/s41687-020-0182-6
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author Dieperink, Karin Brochstedt
Elnegaard, Caroline Matilde
Winther, Bodil
Lohman, Anna
Zerlang, Ida
Möller, Sören
Zangger, Graziella
author_facet Dieperink, Karin Brochstedt
Elnegaard, Caroline Matilde
Winther, Bodil
Lohman, Anna
Zerlang, Ida
Möller, Sören
Zangger, Graziella
author_sort Dieperink, Karin Brochstedt
collection PubMed
description PURPOSE: Insomnia is a frequent sleeping disorder in the general and clinical population. With an increasing proportion of health care services being provided as outpatient care, a short, valid and reliable tool is needed to identify insomnia in medical patients under outpatient care in Denmark. The Insomnia Severity Index (ISI) could be the needed tool if found valid and reliable. Hence, the aim of this study is to evaluate elements of the psychometric properties of the Danish version of ISI (ISI-DK). METHODS: Outpatients from three hospital wards and one rehabilitation center were asked to complete the ISI-DK twice, 2 weeks apart. Internal consistency, discriminative validity, test-retest reliability, and measurement error was assessed. RESULTS: The ISI-DK was completed by 249 (79.0%) participants the first time, and 163 (65.5%) the second time. Respondents had a mean age of 58.2 years (SD 13.5) and 63.5% were women. All but one of the discriminative hypotheses was accepted. Internal consistency was high in the global scale at 0.90 and good with Cronbach’s alpha at 0.75–0.88 in the proposed subscales. The test-retest reliability was good, as the intraclass correlation was 0.90 (95% CI: 0.87; 0.93). Ceiling and floor effects were low < 4.4%. Standard error of measurement was 2.52 and smallest detectable change 6.99. CONCLUSION: This preliminary assessment showed encouraging results supporting the ISI-DK as a valid and reliable tool for screening insomnia severity in Danish outpatients with a medical condition, but further assessments are needed.
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spelling pubmed-70520942020-03-16 Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition Dieperink, Karin Brochstedt Elnegaard, Caroline Matilde Winther, Bodil Lohman, Anna Zerlang, Ida Möller, Sören Zangger, Graziella J Patient Rep Outcomes Research PURPOSE: Insomnia is a frequent sleeping disorder in the general and clinical population. With an increasing proportion of health care services being provided as outpatient care, a short, valid and reliable tool is needed to identify insomnia in medical patients under outpatient care in Denmark. The Insomnia Severity Index (ISI) could be the needed tool if found valid and reliable. Hence, the aim of this study is to evaluate elements of the psychometric properties of the Danish version of ISI (ISI-DK). METHODS: Outpatients from three hospital wards and one rehabilitation center were asked to complete the ISI-DK twice, 2 weeks apart. Internal consistency, discriminative validity, test-retest reliability, and measurement error was assessed. RESULTS: The ISI-DK was completed by 249 (79.0%) participants the first time, and 163 (65.5%) the second time. Respondents had a mean age of 58.2 years (SD 13.5) and 63.5% were women. All but one of the discriminative hypotheses was accepted. Internal consistency was high in the global scale at 0.90 and good with Cronbach’s alpha at 0.75–0.88 in the proposed subscales. The test-retest reliability was good, as the intraclass correlation was 0.90 (95% CI: 0.87; 0.93). Ceiling and floor effects were low < 4.4%. Standard error of measurement was 2.52 and smallest detectable change 6.99. CONCLUSION: This preliminary assessment showed encouraging results supporting the ISI-DK as a valid and reliable tool for screening insomnia severity in Danish outpatients with a medical condition, but further assessments are needed. Springer International Publishing 2020-03-02 /pmc/articles/PMC7052094/ /pubmed/32124114 http://dx.doi.org/10.1186/s41687-020-0182-6 Text en © The Author(s) 2020 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Research
Dieperink, Karin Brochstedt
Elnegaard, Caroline Matilde
Winther, Bodil
Lohman, Anna
Zerlang, Ida
Möller, Sören
Zangger, Graziella
Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition
title Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition
title_full Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition
title_fullStr Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition
title_full_unstemmed Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition
title_short Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition
title_sort preliminary validation of the insomnia severity index in danish outpatients with a medical condition
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7052094/
https://www.ncbi.nlm.nih.gov/pubmed/32124114
http://dx.doi.org/10.1186/s41687-020-0182-6
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