ArticleInternet interventions2026
Culturally adapted digital cognitive behavioral therapy for insomnia in South Korea - a double-blind randomized controlled trial.
Article in Internet interventions, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05822999 (A Multicenter, Randomized, Double-blinded, Sham-controlled Clinical Trial to Evaluate the Safety and Efficacy of Digital Cognitive Behavioral Therapy for Insomnia), which is not on this map. Not yet cited in PubMed.
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A Multicenter, Randomized, Double-blinded, Sham-controlled Clinical Trial to Evaluate the Safety and Efficacy of Digital Cognitive Behavioral Therapy for Insomnia
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Abstract
Culturally adapted digital cognitive behavioral therapy for insomnia (dCBT-I) has the potential to enhance engagement and treatment outcomes, yet its efficacy compared to patient education (PE) remains understudied. This multicenter, double-blind, randomized controlled trial evaluated dCBT-I versus a PE application in individuals with chronic insomnia in South Korea. The primary outcome was Insomnia Severity Index (ISI) scores. Secondary and exploratory outcomes included sleep diary measures, self-reported scales assessing sleep quality, maladaptive sleep-related beliefs, daytime sleepiness, anxiety, and depressive symptoms. Of 52 participants (mean [SD] age, 38.6 [12.4] years; 64% female), 27 were randomized to digital cognitive behavioral therapy for insomnia (dCBT-I) and 25 to patient education (PE). Post-intervention data were available for 50 participants (dCBT-I: n = 25; PE: n = 25). Further exploratory 3-month follow-up data were available for 25 participants in the dCBT-I group. Both groups showed significant within-group improvements in ISI scores, with no significant between-group differences. The dCBT-I group demonstrated greater improvements in sleep quality (PSQI: Cohen d = 1.02, P = .012) and maladaptive sleep-related beliefs (DBAS-16: Cohen d = 1.24, P = .003). Sleep diary data indicated significant reductions in sleep onset latency (Cohen d = -0.15, P = .005) and increases in sleep efficiency (Cohen d = 0.16, P = .003) in the dCBT-I group. Adherence to dCBT-I was high (89% completed all modules), and satisfaction ratings were higher than in the PE group. While both interventions improved insomnia severity, dCBT-I provided additional benefits in sleep-related outcomes, supporting the feasibility and potential clinical utility of this culturally adapted intervention. Clinical Trial Registration: https://clinicaltrials.gov/study/NCT05822999, ClinicalTrials.gov (NCT05822999).
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