Academic article

• Miguel Garcia argibay; Tore Hofstad; Ingvar Bjelland et al. (2026). ADHD medication discontinuation and non-adherence: a Norwegian population-based register study. (external link)
• Ashmita Chaulagain; Tarjei Widding-Havnerås; Felix Elwert et al. (2026). Effect of pharmacological treatment of attention–deficit hyperactivity disorder on contacts with child welfare services. (external link)
• Ashmita Chaulagain; Tarjei Widding-Havnerås; Ingvild Lyhmann et al. (2025). Lifetime Contacts with Child Welfare Services among Children and Adolescents with ADHD: A Population-Based Registry Study. (external link)
• Bjørg Ulvik; Ingvar Bjelland; Berit Rokne Hanestad et al. (2008). Comparison of the Short Form 36 and the Hospital Anxiety and Depression Scale measuring emotional distress in patients admitted for elective coronary angiography. (external link)
• Elisabeth Jeppesen; Ingvar Bjelland; Sophie Dorothea Fosså et al. (2016). Health-related quality of life in teenagers with a parent with cancer. (external link)
• Arne Kodal; Ingvar Bjelland; Rolf Gjestad et al. (2017). Subtyping social anxiety in youth. (external link)
• Nicolas Øyane; Ingvar Bjelland; Ståle Pallesen et al. (2008). Seasonality is associated with anxiety and depression: The Hordaland health study. (external link)
• Arne Kodal; Krister Fjermestad; Ingvar Bjelland et al. (2018). Predictors of long-term outcome of CBT for youth with anxiety disorders treated in community clinics. (external link)
• Anne Mari Sund; Ingvar Bjelland; Helge Holgersen et al. (2012). Depresjon hos barn og unge - med vekt på biologiske modeller. (external link)
• Felice N Jacka; Simon Øverland; Robert Stewart et al. (2009). Association between magnesium intake and depression and anxiety in community-dwelling adults: the Hordaland Health Study. (external link)
• Ingvar Bjelland; Alv Andreas Dahl; Tone Tangen Haug et al. (2002). The validity of the Hospital Anxiety and Depression Scale: An updated literature review. (external link)
• Ingvar Bjelland; Per Magne Ueland; Stein Emil Vollset (2003). Folate and depression. (external link)
• Alv Andreas Dahl; Ingvar Bjelland; Tor Jacob Moe et al. (2002). Etablering av en gruppe for psykiatrisk epidemiologisk forskning i Bergen. (external link)
• Ingvar Bjelland; Grethe Seppola Tell; Stein Emil Vollset et al. (2003). Folate, Vitamin B12, Homocysteine, and the MTHFR 677C->T Polymorphism in Anxiety and Depression: The Hordaland Homocysteine Study. (external link)
• Gry Lill Hamre; Reidunn Huus; Bente Storm Mowatt Haugland et al. (2019). Fedres deltagelse i utredning og behandling av barn og ungdom med angstlidelse. (external link)
• Maria Therese Barøy Ræder; Ingvar Bjelland; Stein Emil Vollset et al. (2006). Obesity, dyslipidemia, and diabetes with selective serotonin reuptake inhibitors: The Hordaland Health Study. (external link)
• Tarjei Widding-Havnerås; Henrik Daae Zachrisson; Simen Markussen et al. (2023). Effect of Pharmacological Treatment of Attention-Deficit/Hyperactivity Disorder on Criminality. (external link)
• Ingvar Bjelland; Grethe S Tell; Stein Emil Vollset et al. (2009). Choline in anxiety and depression: the Hordaland Health Study. (external link)
• Helga Refsum; Eha Nurk; A.D. Smith et al. (2006). The hordaland homocysteine study: A community-based study of homocysteine, its determinants, and associations with disease. (external link)
• Anne Mari Sund; Ingvar Bjelland; Helge Holgersen et al. (2012). Om depresjon hos barn og unge med vekt på biologiske modeller. (external link)
• Elisabeth Jeppesen; Ingvar Bjelland; Sophie Dorothea Fosså et al. (2013). Psychosocial problems of teenagers who have a parent with cancer: a population-based case-control study (Young-HUNT Study). (external link)
• Tarjei Widding-Havnerås; Felix Elwert; Simen Markussen et al. (2023). Effect of ADHD medication on risk of injuries: a preference-based instrumental variable analysis. (external link)
• Tove Aminda Hanssen; Jan Erik Nordrehaug; Geir Egil Eide et al. (2009). Anxiety and depression after acute myocardial infarction: an 18-month follow-up study with repeated measures and comparison with a reference population. (external link)
• Arne Kodal; Krister Fjermestad; Ingvar Bjelland et al. (2017). Long-term effectiveness of cognitive behavioral therapy for youth with anxiety disorders. (external link)
• Jon Skarstein; Ingvar Bjelland; Alv A Dahl et al. (2005). Is there an association between haemoglobin, depression, and anxiety in cancer patients?. (external link)
• Ingvild Lyhmann; Tarjei Widding-Havnerås; Henrik Daae Zachrisson et al. (2022). Variation in attitudes toward diagnosis and medication of ADHD: a survey among clinicians in the Norwegian child and adolescent mental health services. (external link)
• Karin Nordin; Afsaneh Hayat Roshanai; Cathrine Bjorvatn et al. (2011). Is genetic counseling a stressful event?. (external link)
• Krister Fjermestad; Christina Lium; Einar Heiervang et al. (2020). Parental internalizing symptoms as predictors of anxiety symptoms in clinic-referred children. (external link)
• Bjørg Ulvik; Ingvar Bjelland; Berit Rokne Hanestad et al. (2008). Comparison of the Short Form 36 and the Hospital Anxiety and Depression Scale measuring emotional distress in patients admitted for elective coronary angiography. (external link)
• Einar Heiervang; Kjell Morten Stormark; Astri Johansen Lundervold et al. (2007). Psychiatric disorders in Norwegian 8-to 10-year-olds: An epidemiological survey of prevalence, risk factors, and service use. (external link)
• Karstein Haldorsen; Ingvar Bjelland; Anne Isine Bolstad et al. (2011). A five-year prospective study of fatigue in primary Sjögren’s syndrome. (external link)
• Heike Eichele; Tom Eichele; Ingvar Bjelland et al. (2016). Performance monitoring in medication-naïve children with Tourette Syndrome. (external link)
• Eha Nurk; Helga Refsum; Ingvar Bjelland et al. (2013). Plasma free choline, betaine and cognitive performance: the Hordaland Health Study. (external link)
• Arnstein Mykletun; Tarjei Widding-Havneraas; Ashmita Chaulagain et al. (2021). Causal modelling of variation in clinical practice and long-term outcomes of ADHD using Norwegian registry data: The ADHD controversy project. (external link)
• Tarjei Widding-Havneraas; Simen Markussen; Felix Elwert et al. (2022). Geographical variation in ADHD: do diagnoses reflect symptom levels?. (external link)
• Ingvar Bjelland; Maj-Britt Rocio Posserud; Gro Janne Henningsen Wergeland (2022). Dialogue based early detection—Development of a novel approach for detection of mental health problems among children in daycare centers. (external link)
• Felice N. Jacka; Arnstein Mykletun; Michael Berk et al. (2011). The association between habitual diet quality and the common mental disorders in community-dwelling adults: the Hordaland health study. (external link)
• Gro Janne Wergeland; Krister Fjermestad; Carla E. Marin et al. (2016). Predictors of treatment outcome in an effectiveness trial of cognitive behavioral therapy for children with anxiety disorders. (external link)
• Gro Janne Henningsen Wergeland; Krister Fjermestad; Carla E. Marin et al. (2014). An effectiveness study of individual vs. group cognitive behavioral therapy for anxiety disorders in youth. (external link)
• Maria Therese Barøy Ræder; Vidar Martin Steen; Stein Emil Vollset et al. (2007). Associations between cod liver oil use and symptoms of depression: The Hordaland Health Study. (external link)
• Ingvild Lyhmann; Tarjei Widding-Havnerås; Ingvar Bjelland et al. (2024). Effect of pharmacological treatment of attention-deficit/hyperactivity disorder on later psychiatric comorbidity: a population-based prospective long-term study. (external link)
• Ingvar Bjelland; Alv Andreas Dahl (1999). Angst og depresjon - en vanlig blanding. (external link)
• Ingvar Bjelland; Stein A Lie; Alv A Dahl et al. (2009). A dimensional versus a categorical approach to diagnosis: Anxiety and depression in the HUNT 2 study. (external link)
• Eystein Stordal; Ingvar Bjelland; Alf Dahl et al. (2003). Anxiety and depression in individuals with somatic health problems. The Nord-Trondelag Health Study (HUNT). (external link)
• Gunhild Felde; Ingvar Bjelland; Steinar Hunskaar (2012). Anxiety and depression associated with incontinence in middle-aged women: a large Norwegian cross-sectional study. (external link)
• Elisabeth Jeppesen; Ingvar Bjelland; Sophie Dorothea Fosså et al. (2014). Does a parental history of cancer moderate the associations between impaired health status in parents and psychosocial problems in teenagers: a HUNT study.. (external link)
• Ingvar Bjelland; Steinar Krokstad; Arnstein Mykletun et al. (2008). Does a higher educational level protect against anxiety and depression? The HUNT study. (external link)
• Tore Hofstad; Olav Nyttingnes; Ingvar Bjelland et al. (2025). Catchment area characteristics do not account for geographical variation in ADHD diagnoses. (external link)
• Bjørn Hildrum; Arnstein Mykletun; Eystein Stordal et al. (2007). Association of low blood pressure with anxiety and depression: the Nord-Trondelag Health Study. (external link)

Study protocol

• Ingvar Bjelland; Gro Janne Henningsen Wergeland; Christopher Gillberg et al. (2025). PRO-DIALOG—the effect of a novel dialogue-based parent-teacher conference on mental health in kindergarten children: a cluster randomized controlled trial. (external link)

Conference abstract

• Gunhild Felde; Ingvar Bjelland; Steinar Hunskaar (2009). ANXIETY AND DEPRESSION ASSOCIATED WITH INCONTINENCE IN MIDDLE AGED WOMEN. (external link)
• Ingvar Bjelland; S Krokstad; Arnstein Mykletun et al. (2004). Education as a predictor for anxiety and depression - a population-based cohort study. (external link)
• MB Raeder; Ingvar Bjelland; J Ferno et al. (2006). Lipogenic effects of antidepressant drugs: Transcriptional stimulation of cellular lipid biosynthesis is a potential marker of drug-induced metabolic side-effects. (external link)
• Reidar Tyssen; Per Jørgen Wiggen Vaglum; Jan Ole Røvik et al. (2004). Prevalence and predictors of depressive symptoms among Norwegian physicians: A 10-year longitudinal study. (external link)

Conference lecture

• Reidar Tyssen; Per Jørgen Wiggen Vaglum; Jan Ole Røvik et al. (2004). Prevalence and predictors of depressive symptoms among Norwegian physicians: a 10-year longitudinal study. (external link)
• Tore Hofstad; Olav Nyttingnes; Anne Hege Henden Strand et al. (2024). Tic Talk: Ten years later – Long term outcomes for Tourette’s and Tic Disorders. (external link)
• Ingvar Bjelland (2004). Symptomer på nevroutviklingsforstyrrelser hos barn med emosjonelle vansker � Barn i Bergen studien. (external link)
• Reidar Tyssen; Per Vaglum; JO Røvik et al. (2004). Prevalence and predictors of depressive symptoms among Norwegian physicians: A 10-year longitudinal study. (external link)
• Reidar Tyssen; Per Jørgen Wiggen Vaglum; Jan Ole Røvik et al. (2005). Depressive symptoms among Norwegian physicians: a 10-year longitudinal study of prevalence and predictors. (external link)
• Ingvar Bjelland; Steinar Krokstad; Arnstein Mykletun et al. (2004). Education as a predictor for anxiety and depression � a population-based cohort study. (external link)
• Bjørn Hildrum; Arnstein Mykletun; Eystein Stordal et al. (2004). There is a relation between low blood pressure and anxiety/depression. (external link)
• Ingvar Bjelland (2003). Associations between neurodevelopemental and emotional problems. (external link)
• Reidar Tyssen; Kariann Mjelde Røsbak; Line Kjær Løvereide et al. (2010). Mental distress among medical students and university college students: the role of gender. (external link)
• Ingvar Bjelland; Grethe Seppola Tell; Stein Emil Vollset et al. (2002). Homocystein og depresjon. (external link)
• Ingvar Bjelland (2002). Brukerundersøkelsen, BUP Sentrum. (external link)
• Ingvar Bjelland; Grethe Seppola Tell; Stein Emil Vollset et al. (2002). Folate, B12, homocysteine and MTHFR C677T polymorphism in anxiety and depression. (external link)
• Ingvar Bjelland (2002). The user inquiry, BUP-Sentrum. (external link)
• Ingvar Bjelland; Grethe Seppola Tell; Stein Emil Vollset et al. (2002). Symptoms of anxiety and depression among subjects with elevated plasma homocysteine or lowered plasma folate in a population sample. (external link)
• Reidar Tyssen; Per Jørgen Wiggen Vaglum; Jan Ole Røvik et al. (2004). Depressive Symptoms among Norwegian Physicians: a 10-Year Longitudinal Study of Prevalence and Predictors. (external link)
• Reidar Tyssen; Karianne Mjelde Olsen; Line Kjær Løvereide et al. (2007). Do medical students experience more stress and depressive symptoms than other students do?. (external link)

Conference poster

• Heike Eichele; Tom Eichele; Ingvar Bjelland et al. (2011). Cognitive and Behavioral Control in Children with Tourette Syndrome. (external link)
• Ingvar Bjelland; Grethe Seppola Tell; Stein Emil Vollset et al. (2002). Folate, vitamin B12, homocysteine and MTHFR C677T polymorphism in anxiety and depression. (external link)
• I Bjelland; Eystein Stordal; A Mykletun et al. (2001). Anxiety and depression co-dimensionality in the general population. (external link)
• Ingvar Bjelland; Grethe Seppola Tell; Stein Emil Vollset (2002). Hyperhomocysteinemia is associated with depression, but not axiety. (external link)
• Heike Eichele; Tom Eichele; Ingvar Bjelland et al. (2015). Cognitive and Behavioral Control in Children with Tourette Syndrome. (external link)
• Reidar Tyssen; Karianne M Røsbak; Line Kjær Løvereide et al. (2010). Mental distress among medical students and university college students: The role of gender. (external link)
• Gro Janne Henningsen Wergeland; Krister Westlye Fjermestad; C. E. Marin et al. (2014). Predictors of treatment outcome.. (external link)
• Ingvar Bjelland; Grethe Tell; Stein Emil Vollset et al. (2002). The C677T polymorphism of the methylenetetrahydrofolate reductase (MTHFR) gene is associated with depression, but not anxiety. (external link)
• Kerstin J. Plessen; Lin Sørensen; Heike Eichele et al. (2009). Emotional regulation in children with ADHD - a longitudinal study. (external link)

Media feature article

• Ingvar Bjelland; Alv A Dahl (2008). Dimensjonal diagnostikk ny klassifisering av psykiske lidelser. (external link)

Academic book chapter

• Jon Fauskanger Bjåstad; Gro Janne Wergeland; Krister Fjermestad et al. (2016). Long-term outcome and predictors of outcome in CBT for youth anxiety. (external link)
• Ingvar Bjelland (2012). Bipolare lidelser blant barn og unge. (external link)

Doctoral thesis (PhD)

• Ingvar Bjelland; Grethe S Tell; Alv A Dahl (2004). Anxiety and depression in the general population : issues related to assessment, comorbidity, and risk factors. (external link)
• Arne Kodal; Ingvar Bjelland; Gro Janne Wergeland et al. (2018). Long-term effectiveness of cognitive behavior therapy for youth with anxiety disorders: Outcome, predictors and social anxiety. (external link)

Academic literature review

• Ashmita Chaulagain; Ingvild Lyhmann; Anne Halmøy et al. (2023). A systematic meta-review of systematic reviews on attention deficit hyperactivity disorder. (external link)
• Thomas Jozefiak; Ketil Hanssen-Bauer; Ingvar Bjelland (2018). Måleegenskaper ved den norske versjonen av Children’s Global Assessment Scale (CGAS). (external link)

See a complete overview of publications in NVA.