Blar i Bergen Open Research Archive på forfatter "Kallestad, Håvard"
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Digital cognitive behaviour therapy for insomnia in individuals with self-reported insomnia and chronic fatigue: A secondary analysis of a large scale randomized controlled trial
Ramfjord, Lina Stålesen; Faaland, Patrick Michael Palmelund; Scott, Janine Linda; Saksvik, Simen Berg; Lydersen, Stian; Vedaa, Øystein; Kahn, Nikolaj; Langsrud, Knut; Stiles, Tore Charles; Ritterband, Lee M.; Harvey, Allison G.; Sivertsen, Børge; Kallestad, Håvard (Journal article; Peer reviewed, 2023)Insomnia is associated with fatigue, but it is unclear whether response to cognitive behaviour therapy for insomnia is altered in individuals with co-occurring symptoms of insomnia and chronic fatigue. This is a secondary ... -
Dysfunctional beliefs and attitudes about sleep (DBAS) mediate outcomes in dCBT-I on psychological distress, fatigue, and insomnia severity
Faaland, Patrick; Vedaa, Øystein; Langsrud, Knut; Sivertsen, Børge; Lydersen, Stian; Saksvik, Simen Berg; Vestergaard, Cecilie Lund; Kjørstad, Kaia; Vethe, Daniel; Ritterband, Lee M.; Harvey, Allison G.; Stiles, Tore Charles; Scott, Janine Linda; Kallestad, Håvard (Journal article; Peer reviewed, 2023)Objective/background Digital cognitive behavioral therapy for insomnia (dCBT-I) improves several sleep and health outcomes in individuals with insomnia. This study investigates whether changes in Dysfunctional Beliefs and ... -
Effects of digital cognitive behavioural therapy for insomnia on insomnia severity: a large-scale randomised controlled trial
Vedaa, Øystein; Kallestad, Håvard; Scott, Janine Linda; Smith, Otto Robert Frans; Pallesen, Ståle; Morken, Gunnar; Langsrud, Knut; Gehrman, Philip; Thorndike, Frances P.; Ritterband, Lee M.; Harvey, Allison G.; Stiles, Tore C; Sivertsen, Børge (Journal article, 2020)Background Although several large-scale randomised controlled trials have shown the efficacy of digital cognitive behavioural therapy for insomnia (dCBT-I), there is a need to validate widespread dissemination of dCBT-I ... -
Evening light environments can be designed to consolidate and increase the duration of REM-sleep
Vethe, Daniel; Drews, Henning Johannes; Scott, Janine Linda; Engstrøm, Morten; Heglum, Hanne Siri Amdahl; Grønli, Janne; Wisor, J.P.; Sand, Trond; Lydersen, Stian; Kjørstad, Kaia; Faaland, Patrick; Vestergaard, Cecilie Lund; Langsrud, Knut; Kallestad, Håvard (Journal article; Peer reviewed, 2022)Evening exposure to short-wavelength light has disruptive effects on circadian rhythms and sleep. These effects can be mitigated by blocking short-wavelength (blue) frequencies, which has led to the development of evening ... -
Group‑delivered cognitive behavioural therapy versus waiting list in the treatment of insomnia in primary care: study protocol for a pragmatic, multicentre randomized controlled trial
Hrozanova, Maria; Meisingset, Ingebrigt; Kallestad, Håvard; Pallesen, Ståle; Nordstoga, Anne Lovise; Skarpsno, Eivind Schjelderup (Journal article; Peer reviewed, 2023)Background Insomnia is common in the general population and is a risk factor for ill-health, which highlights the importance of treating insomnia effectively and cost-efficiently. Cognitive-behavioural therapy for insomnia ... -
Insomnia as a predictor of treatment outcomes in adolescents receiving concentrated exposure treatment for OCD
Skjold, Solvei Harila; Hagen, Kristen; Wheaton, Michael G.; Kallestad, Håvard; Hjelle, Kay Morten; Björgvinsson, Thröstur; Hansen, Bjarne Kristian Aaslie (Journal article; Peer reviewed, 2024)Background Research suggests that individuals with obsessive-compulsive disorder (OCD) frequently experience insomnia. Some previous studies have suggested that insomnia may predict treatment outcomes, but the evidence ... -
Long-Term Effects of an Unguided Online Cognitive Behavioral Therapy for Chronic Insomnia
Vedaa, Øystein; Hagatun, Susanne; Kallestad, Håvard; Pallesen, Ståle; Smith, Otto Robert Frans; Thorndike, Frances P; Ritterband, Lee M.; Sivertsen, Børge (Peer reviewed; Journal article, 2019)STUDY OBJECTIVES: The aim of this study was to test the efficacy of fully automated Internet-delivered cognitive behavioral therapy for insomnia (CBT-I) 18 months after the intervention period on sleep, daytime functioning, ... -
Overcoming insomnia: Protocol for a large-scale randomised controlled trial of online cognitive behaviour therapy for insomnia compared with online patient education about sleep
Kallestad, Håvard; Vedaa, Øystein; Scott, Janine Linda; Morken, Gunnar; Pallesen, Ståle; Harvey, Allison G.; Gehrman, Phil; Thorndike, Frances; Ritterband, Lee; Stiles, Tore C; Sivertsen, Børge (Peer reviewed; Journal article, 2018)Introduction Insomnia is a major public health concern. While cognitive behaviour therapy for insomnia (CBT-I) is acknowledged as the best available intervention, there are unanswered questions about its wider dissemination, ... -
Short and long-term effects of unguided internet-based cognitive behavioral therapy for chronic insomnia in morning and evening persons: a post-hoc analysis
Lien, Mats; Bredeli, Einar Rørstad; Sivertsen, Børge; Kallestad, Håvard; Pallesen, Ståle; Smith, Otto Robert Frans; Faaland, Patrick; Ritterband, Lee M.; Thorndike, Frances P.; Vedaa, Øystein (Peer reviewed; Journal article, 2019)A post-hoc analysis comparing morning and evening persons with insomnia on sleep and mental health characteristics was conducted in order to investigate whether an Internet-based cognitive behavioral therapy for insomnia ... -
Sleep and work functioning in nurses undertaking inpatient shifts in a blue-depleted light environment
Kjørstad, Kaia; Faaland, Patrick; Sivertsen, Børge; Kallestad, Håvard; Langsrud, Knut; Vethe, Daniel; Vestergaard, Cecilie Lund; Harris, Anette Kristoffersen; Pallesen, Ståle; Scott, Jan; Vedaa, Øystein (Journal article; Peer reviewed, 2022-07-18)Background: Blue-depleted light environments (BDLEs) may result in beneficial health outcomes for hospital inpatients in some cases. However, less is known about the effects on hospital staff working shifts. This study ...