Digital App Based Cognitive Behaviour Therapy CBT-I Course Improving Insomnia and Sleep Hygiene: A Randomised Controlled Trial.

J Sleep Res · 2026 · PMC13003281 · PMID 41031473

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highly significantno p-value reported

4.1 Reduction in Insomnia Severity ( ISI ) Participation in the dCBT‐I course led to a highly significant reduction in insomnia symptoms, with a mean improvement of −4.79 points on the ISI (Cohen's d = 1.35).

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