Browsing Bergen Open Research Archive by Author "Widding-Havnerås, Tarjei"
Now showing items 1-14 of 14
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Causal modelling of variation in clinical practice and long-term outcomes of ADHD using Norwegian registry data: The ADHD controversy project
Mykletun, Arnstein; Widding-Havnerås, 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. ... -
Effect of ADHD Medication on Criminality and Injuries : Quasi-Experimental Evidence for Patients on the Margin of Treatment
Widding-Havnerås, Tarjei (Doctoral thesis, 2023-11-07)Attention-deficit/hyperactivity disorder (ADHD) er den vanligste nevropsykiatriske lidelsen hos barn og unge. Store geografiske variasjoner i diagnostisering og medisinering av ADHD har bidratt til bekymringer om under- ... -
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, 2024)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, 2024)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 ... -
Effect of pharmacological treatment of attention-deficit/hyperactivity disorder on later psychiatric comorbidity: a population-based prospective long-term study
Lyhmann, Ingvild; Widding-Havnerås, Tarjei; Bjelland, Ingvar; Markussen, Simen; Elwert, Felix; Chaulagain, Ashmita; Mykletun, Arnstein; Halmøy, Anne (Journal article; Peer reviewed, 2024)Background Psychiatric comorbidity is frequent among persons with attention-deficit/hyperactivity disorder (ADHD). Whether pharmacological treatment of ADHD influences the incidence of psychiatric comorbidity is ... -
A gentle introduction to instrumental variables
Widding-Havnerås, Tarjei; Zachrisson, Henrik Daae (Journal article; Peer reviewed, 2022)Instrumental variables (IV) is a central strategy for identifying causal effects in absence of randomized experiments. Clinicians and epidemiologists may find the intuition of IV easy to grasp by comparison to randomized ... -
Geographical variation in ADHD: do diagnoses refect symptom levels?
Widding-Havnerås, 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 outcomes and causal modelling of compulsory inpatient and outpatient mental health care using Norwegian registry data : protocol for a controversies in psychiatry research project
Hofstad, Tore; Nyttingnes, Olav; Markussen, Simen; Johnsen, Erik; Killackey, Eoin; McDaid, David; Rinaldi, Miles; Dean, Kimberlie; Brinchmann, Beate; Douglas, Kevin Stewart; Gröning, Linda; Bjørkly, Stål Kapstø; Palmstierna, Tom Krisman Kule; Strømme, Maria Fagerbakke; Blindheim, Anne Alnes; Rugkåsa, Jorun; Hofmann, Bjørn Morten; Pedersen, Reidar; Widding-Havnerås, Tarjei; Rypdal, Knut; Mykletun, Arnstein (Journal article; Peer reviewed, 2023)Objectives: Compulsory mental health care includes compulsory hospitalisation and outpatient commitment with medication treatment without consent. Uncertain evidence of the effects of compulsory care contributes to large ... -
Nye sosiale risikoer i den norske velferdsstaten? En kvantitativ analyse av unge voksne sin arbeidsmarkedstilknytning i tidsperioden 1993-2009
Widding-Havnerås, Tarjei (Master thesis, 2015-05-11)Denne oppgaven tar for seg endringer i unge voksne sin arbeidsmarkedstilknytning de siste to tiårene. Tematikken er valgt på bakgrunn av forskningslitteratur som viser hvordan fremveksten av postindustrielle arbeidsmarkeder, ... -
Preference-based instrumental variables in health research rely on important and underreported assumptions: a systematic review
Widding-Havnerås, Tarjei; Chaulagain, Ashmita; Lyhmann, Ingvild; Zachrisson, Henrik Daae; Elwert, Felix; Markussen, Simen; McDaid, David; Mykletun, Arnstein (Journal article; Peer reviewed, 2021)Objective: Preference-based instrumental variables (PP IV) designs can identify causal effects when patients receive treatment due to variation in providers’ treatment preference. We offer a systematic review and methodological ... -
The role of welfare regimes in the relationship between childhood economic stress and adult health: a multilevel study of 20 European countries
Widding-Havnerås, Tarjei; Pedersen, Siri Hansen (Journal article; Peer reviewed, 2020)Childhood economic conditions are important for adult health, and welfare regimes may modify this relationship by altering exposure to social determinants of health. We examine the association between childhood economic ... -
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 ... -
Unge voksne som verken er i arbeid eller utdanning : en registerbasert studie, 1993-2009
Widding-Havnerås, Tarjei (Peer reviewed; Journal article, 2016)Denne studien undersøker om unge voksnes risiko for å være verken i arbeid eller utdanning har økt de siste to tiårene. Det undersøkes også om risikoen er blitt mer sosialt skjevfordelt. Analysen følger et sett sosiale ... -
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 ...