Blar i Bergen Open Research Archive på forfatter "Bjelland, Ingvar"
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Anxiety and depression in the general population : issues related to assessment, comorbidity, and risk factors
Bjelland, Ingvar (Doctoral thesis, 2004-06-18) -
Causal modelling of variation in clinical practice and long-term outcomes of ADHD using Norwegian registry data: The ADHD controversy project
Mykletun, Arnstein; Widding-Havneraas, Tarjei; Chaulagain, Ashmita; Lyhmann, Ingvild; Bjelland, Ingvar; Halmøy, Anne; Elwert, Felix; Butterworth, Peter; Markussen, Simen; Zachrisson, Henrik Daae; Rypdal, Knut (Journal article; Peer reviewed, 2021)Introduction Attention-deficit/hyperactivity disorder (ADHD) is among the most common mental disorders in children and adolescents, and it is a strong risk factor for several adverse psychosocial outcomes over the lifespan. ... -
Dialogue Based Early Detection—Development of a Novel Approach for Detection of Mental Health Problems Among Children in Daycare Centers
Bjelland, Ingvar; Posserud, Maj-Britt Rocio; Wergeland, Gro Janne Henningsen (Journal article; Peer reviewed, 2022)Background: Among 1–7 years old children the worldwide prevalence of mental disorders is ~20%. Without treatment, the prognosis of such disorders in children is poor. Early intervention is estimated to result in a positive ... -
Does a parental history of cancer moderate the associations between impaired health status in parents and psychosocial problems in teenagers: a HUNT study.
Jeppesen, Elisabeth; Bjelland, Ingvar; Fosså, Sophie Dorothea; Loge, Jon Håvard; Sørebø, Øystein; Dahl, Alv A. (Peer reviewed; Journal article, 2014-08)Severe disease in a parent is associated with increased psychosocial problems in their children. However, moderating factors of such associations are less studied. In this cross-sectional population-based controlled study ... -
Effect of ADHD medication on risk of injuries: a preference-based instrumental variable analysis
Widding-Havnerås, Tarjei; Elwert, Felix; Markussen, Simen; Zachrisson, Henrik Daae; Lyhmann, Ingvild; Chaulagain, Ashmita; Bjelland, Ingvar; Halmøy, Anne; Rypdal, Knut; Mykletun, Arnstein (Journal article; Peer reviewed, 2023)ADHD is associated with an increased risk of injury. Causal evidence for effects of pharmacological treatment on injuries is scarce. We estimated effects of ADHD medication on injuries using variation in provider preference ... -
Effect of Pharmacological Treatment of Attention-Deficit/Hyperactivity Disorder on Criminality
Widding-Havnerås, Tarjei; Zachrisson, Henrik Daae; Markussen, Simen; Elwert, Felix; Lyhmann, Ingvild; Chaulagain, Ashmita; Bjelland, Ingvar; Halmøy, Anne; Rypdal, Knut; Mykletun, Arnstein (Journal article; Peer reviewed, 2023)Objective: Criminality rates are higher among persons with attention-deficit/hyperactivity disorder (ADHD), and evidence that medication reduces crime is limited. Medication rates between clinics vary widely even within ... -
A five-year prospective study of fatigue in primary Sjögren’s syndrome
Haldorsen, Karstein; Bjelland, Ingvar; Bolstad, Anne Isine; Jonsson, Roland; Brun, Johan Gorgas (Peer reviewed; Journal article, 2011-10-13)Introduction: Fatigue is prevalent in primary Sjögren’s syndrome (pSS), and contributes to the considerably reduced health related quality of life in this disease. The symptom is included in proposed disease activity and ... -
Geographical variation in ADHD: do diagnoses refect symptom levels?
Widding-Havneraas, Tarjei; Markussen, Simen; Elwert, Felix; Lyhmann, Ingvild; Bjelland, Ingvar; Halmøy, Anne; Chaulagain, Ashmita; Ystrøm, Eivind; Mykletun, Arnstein; Zachrisson, Henrik Daae (Journal article; Peer reviewed, 2023)Rates of ADHD diagnosis vary across regions in many countries. However, no prior study has investigated how much within-country geographic variation in ADHD diagnoses is explained by variation in ADHD symptom levels. We ... -
Long-term effectiveness of cognitive behavioral therapy for youth with anxiety disorders
Kodal, Arne; Fjermestad, Krister; Bjelland, Ingvar; Gjestad, Rolf; Øst, Lars Gøran; Bjåstad, Jon Fauskanger; Haugland, Bente Storm Mowatt; Havik, Odd E.; Heiervang, Einar; Wergeland, Gro Janne (Peer reviewed; Journal article, 2018-01)Cognitive behavioral therapy (CBT) has demonstrated favorable long-term outcomes in youth with anxiety disorders in efficacy trials. However, long-term outcomes of CBT delivered in a community setting are uncertain. This ... -
Måleegenskaper ved den norske versjonen av Children’s Global Assessment Scale (CGAS)
Jozefiak, Thomas; Hanssen-Bauer, Ketil; Bjelland, Ingvar (Peer reviewed; Journal article, 2018-10-23)Beskrivelse. Children’s Global Assessment Scale (CGAS) ble laget av David Shaffer og medarbeidere i 1983. Den skåres av kliniker og er et mål på barns psykososiale funksjonsnivå i den siste måneden før vurderingstidspunktet ... -
Parental internalizing symptoms as predictors of anxiety symptoms in clinic-referred children
Fjermestad, Krister; lium, christina; Heiervang, Einar; Havik, Odd E.; Haugland, Bente Storm Mowatt; Bjelland, Ingvar; Wergeland, Gro Janne (Journal article; Peer reviewed, 2020)Background: Mothers’ and fathers’ internalizing symptoms may influence children’s anxiety symptoms differently. Objective: To explore the relationship between parental internalizing symptoms and children’s anxiety ... -
Performance monitoring in medication-naïve children with Tourette Syndrome
Eichele, Heike; Eichele, Tom; Bjelland, Ingvar; Høvik, Marie Farstad; Sørensen, Lin; Wageningen, Heidi Karin van; Worren, Marius Kalsås; Hugdahl, Kenneth; Plessen, Kerstin J. (Peer reviewed; Journal article, 2016-03-01)Background: Tourette syndrome (TS) is a childhood-onset neurodevelopmental disorder and its impact on cognitive development needs further study. Evidence from neuropsychological, neuroimaging and electrophysiological studies ... -
Plasma free choline, betaine and cognitive performance: the Hordaland Health Study
Nurk, Eha; Refsum, Helga; Bjelland, Ingvar; Drevon, Christian A; Tell, Grethe S; Ueland, Per Magne; Vollset, Stein Emil; Engedal, Knut Arne; Nygaard, Harald A.; Smith, David A (Peer reviewed; Journal article, 2013-02)Choline and betaine are nutrients involved in one-carbon metabolism. Choline is essential for neurodevelopment and brain function. We studied the associations between cognitive function and plasma concentrations of free ... -
Subtyping social anxiety in youth
Kodal, Arne; Bjelland, Ingvar; Gjestad, Rolf; Wergeland, Gro Janne; Havik, Odd E.; Heiervang, Einar; Fjermestad, Krister (Peer reviewed; Journal article, 2017-06)Few empirical studies have examined subtypes of social anxiety disorder (SAD) in youth, and limited consensus resides on the nature of potential subtypes. Identifying subtypes, based on both fear and avoidance patterns, ... -
A systematic meta-review of systematic reviews on attention deficit hyperactivity disorder
Chaulagain, Ashmita; Lyhmann, Ingvild; Halmøy, Anne; Widding-Havnerås, Tarjei; Nyttingnes, Olav; Bjelland, Ingvar; Mykletun, Arnstein (Journal article; Peer reviewed, 2023)Background There are now hundreds of systematic reviews on attention deficit hyperactivity disorder (ADHD) of variable quality. To help navigate this literature, we have reviewed systematic reviews on any topic on ... -
Variation in attitudes toward diagnosis and medication of ADHD: a survey among clinicians in the Norwegian child and adolescent mental health services
Lyhmann, Ingvild; Widding-Havnerås, Tarjei; Zachrisson, Henrik Daae; Bjelland, Ingvar; Chaulagain, Ashmita; Mykletun, Arnstein; Halmøy, Anne (Journal article; Peer reviewed, 2022)Prevalence and medication rates of ADHD vary geographically, both between and within countries. No absolute cutoff exists between ADHD and normal behavior, making clinician attitudes (leading to local practice cultures) a ...