ArticleJournal of Korean medical science2019
Factor Analysis of the Insomnia Severity Index and Epworth Sleepiness Scale in Shift Workers.
Article in Journal of Korean medical science, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 22 citations in OpenAlex.
- Improving sleep health in paramedics through an app-based intervention: a randomised waitlist control pilot trial.BMC public health · 2024Trial
- Dimensionality and reliability of the Epworth Sleepiness Scale in dental patients referred for oral appliance therapy.Journal of oral & facial pain and headache · 2025Article
- Psychometric Properties of the Insomnia Severity Index and Its Comparison With the Shortened Versions Among the General Population.Psychiatry investigation · 2024Article
- Prevalence of Insomnia in Various Industries and Associated Demographic Factors in Night-Shift Workers Using Workers' Specific Health Examination Data.International journal of environmental research and public health · 2021Article
- Association between Occupational Noise Exposure and Insomnia among Night-Shift Production Workers: A 4-Year Follow-up Study.Noise & healthArticle
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundOver one million Korean night shift workers undergo clinical assessment of sleep using the Insomnia Severity Index (ISI) and Epworth Sleepiness Scale (ESS) by occupational medical examination each year. Therefore, this study was conducted to evaluate the reliability and validity of the ISI and ESS using occupational medical examination data.
methodsThe study subjects included 12,056 shift workers at an electronics company who underwent an occupational health examination about shift work in 2018. The evaluation of the ISI and ESS was performed using exploratory factor analysis (EFA) and confirmatory factor analysis (CFA).
resultsAccording to the results of the EFA, the ISI had a single-factor structure, while the ESS had a two-factor structure, which was inconsistent with the findings of previous studies. The results of the EFA of 15 items from the combined ISI and ESS suggested a three-factor structure, with one factor for ISI items and two factors for ESS items, while the results of the CFA suggested sufficient validity of the combination of the ISI and ESS for sleep evaluation.
conclusionThe results suggest that the ISI and ESS have sufficient reliability and validity to be used for occupational health examinations about shift work.
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