Academic article

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

Academic lecture

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

Academic literature review

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

Doctoral dissertation

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

Academic chapter/article/Conference paper

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

Poster

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

Feature article

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

See a complete overview of publications in Cristin.