ArticleSleep and biological rhythms2025
Validation of a Korean version of the Insomnia Catastrophizing Scale and examination of the relation between catastrophizing and sleep-related cognition.
Article in Sleep and biological rhythms, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study explored the reliability and validity of the Korean version of the Insomnia Catastrophizing Scale (ICS) for assessing catastrophic thoughts related to sleep, shedding light on one of the key cognitive dimensions of insomnia, among the general Korean population. The study analyzed secondary data from 399 participants who completed an online survey conducted during September 26-30, 2022. The survey contained various rating scales, namely, the ICS, Dysfunctional Beliefs and Attitudes about Sleep-16, Glasgow Sleep Effort Scale, Dysfunctional Beliefs about Sleep-2, Insomnia Severity Index, and Patient Health Questionnaire-9. Among the participants, 51.1% were male, with 13.3% reporting past psychiatric symptoms and 12.3%, current psychologic distress. Confirmatory factor analysis confirmed the construct validity of both the nighttime (ICS-N) and daytime (ICS-D) subscales, with good model fits observed. Item response theory analysis indicated strong discrimination ability for both scales. Cronbach's alphas showed the reliability of internal consistency for ICS-N (alpha = 0.950) and ICS-D (alpha = 0.961). The Korean version of the ICS, including both subscales, demonstrated reliability and validity in assessing sleep-related catastrophic thoughts among the general Korean population.
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