Blar i Bergen Open Research Archive på forfatter "Aas, Christer Frode"
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Association between oral and general health related quality of life among Norwegian patients with substance use disorders in opioid agonist therapy
Åstrøm, Anne-Kristine N; Vold, Jørn Henrik; Aas, Christer Frode; Johansson, Kjell Arne; Fadnes, Lars Thore (Journal article; Peer reviewed, 2022)Objective Assess the association between oral and general health related quality of life using oral impacts on daily performances (OIDP) and the quality of life tool EQ-5D-5L from EuroQoL among patients with substance use ... -
The burden of disease among people with severe substance use disorders
Aas, Christer Frode (Doctoral thesis, 2021-06-14)Background: A substance use disorder (SUD) is a potentially severe clinical condition with high co-occurrence of somatic and mental disorders. The burden of disease attributable to substance use contributes to 11.8 million ... -
Changes in substance use during outpatient treatment for substance use disorders: a prospective Norwegian cohort study from 2016 to 2020
Vold, Jørn Henrik; Chalabianloo, Fatemeh; Aas, Christer Frode; Løberg, Else-Marie; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2021)Background Continuous use of amphetamines, alcohol, benzodiazepines, cannabis, cocaine, or opioids contributes to health impairments, increased morbidity, and overdose deaths among patients with substance use disorders ... -
Cost-effectiveness of integrated treatment for hepatitis C virus (HCV) among people who inject drugs in Norway: An economic evaluation of the INTRO-HCV trial
Lim, Aaron Guanliang; Aas, Christer Frode; Çağlar, Ege Su; Vold, Jørn Henrik; Fadnes, Lars T.; Vickerman, Peter; Johansson, Kjell Arne (Journal article; Peer reviewed, 2023)Background and aims The INTRO-HCV randomized controlled trial conducted in Norway over 2017–2019 found that integrated treatment, compared with standard-of-care hospital treatment, for hepatitis C virus (HCV) with ... -
Dispensation of attention deficit hyperactivity disorder (ADHD) medications in patients receiving opioid agonist therapy; A national prospective cohort study in Norway from 2015 to 2017
Vold, Jørn Henrik; Aas, Christer Frode; Skurtveit, Svetlana; Odsbu, Ingvild; Chalabianloo, Fatemeh; Halmøy, Anne; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2020)Background It is estimated that up to a third of patients on opioid agonist therapy (OAT) have attention deficit hyperactivity disorder (ADHD). Treatment by ADHD medication, including a centrally acting stimulant (CAS) ... -
Dispensations of benzodiazepines, zhypnotics, and gabapentinoids to patients receiving opioid agonist therapy; a prospective cohort study in Norway from 2013 to 2017
Vold, Jørn Henrik; Skurtveit, Svetlana; Aas, Christer Frode; Chalabianloo, Fatemeh; Kloster, Pia Synnøve; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2020)Background Dispensations of benzodiazepines, z-hypnotics, and gabapentinoids to patients on opioid agonist therapy (OAT) are common and have pros and cons. The objectives of the current study are to define the dispensation ... -
Effect of integrated hepatitis C virus treatment on psychological distress in people with substance use disorders
Aas, Christer Frode; Vold, Jørn Henrik; Chalabianloo, Fatemeh; Løberg, Else-Marie; Lim, Aaron G.; Vickerman, Peter; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2024)People with substance use disorders (SUD) have a high prevalence of chronic hepatitis C virus (HCV) infection and mental health disorders. We aimed to assess the impact of integrated HCV treatment on psychological distress ... -
The efficacy of integrated hepatitis C virus treatment in relieving fatigue in people who inject drugs: a randomized controlled trial
Vold, Jørn Henrik; Chalabianloo, Fatemeh; Løberg, Else-Marie; Aas, Christer Frode; Lim, Aaron G.; Vickerman, Peter; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2023)Background Most people who inject drugs (PWIDs) suffer from severe fatigue, and chronic hepatitis C virus (HCV) infection may play a role in this. However, there is scarce evidence about interventions that alleviate ... -
Folate Status as a Nutritional Indicator among People with Substance Use Disorder; A Prospective Cohort Study in Norway
Mitra, Bemanian; Vold, Jørn Henrik; Chowdhury, Ranadip; Aas, Christer Frode; Gjestad, Rolf; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2022)Substance use disorder (SUD) is associated with poor nutrition. Vitamin B9, or folate, is an important micronutrient for health. The aim of this prospective longitudinal cohort study was to assess serum folate levels among ... -
Health-related quality of life of long-term patients receiving opioid agonist therapy: a nested prospective cohort study in Norway
Aas, Christer Frode; Vold, Jørn Henrik; Skurtveit, Svetlana; Lim, Aaron G.; Ruths, Sabine; Kamrul, Islam; Askildsen, Jan Erik; Løberg, Else-Marie; Fadnes, Lars T.; Johansson, Kjell Arne (Journal article; Peer reviewed, 2020)Background Opioid dependence carries the highest disease burden of all illicit drugs. Opioid agonist therapy (OAT) is an evidence-based medical intervention that reduces morbidity and mortality. There is limited knowledge ... -
Impact of clinical and sociodemographic factors on fatigue among patients with substance use disorder: a cohort study from Norway for the period 2016–2020
Vold, Jørn Henrik; Gjestad, Rolf; Aas, Christer Frode; Chalabianloo, Fatemeh; Skurtveit, Svetlana; Løberg, Else-Marie; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2020)Background The impact of clinical and sociodemographic factors on fatigue remains unknown among patients with substance use disorders (SUD). This study aims to evaluate fatigue among patients with SUD using a nine-item ... -
Impact of liver fibrosis and clinical characteristics on dose-adjusted serum methadone concentrations
Chalabianloo, Fatemeh; Høiseth, Gudrun; Vold, Jørn Henrik; Johansson, Kjell Arne; Kringen, Marianne K.; Dalgard, Olav; Ohldieck, Christian; Druckrey-Fiskaaen, Karl Trygve; Aas, Christer Frode; Løberg, Else-Marie; Bramness, Jørgen Gustav; Fadnes, Lars T. (Journal article; Peer reviewed, 2023)Background: There is limited knowledge on the causes of large variations in serum methadone concentrations and dose requirements. Objectives: We investigated the impact of the degree of liver fibrosis on dose-adjusted ... -
Integrated care of severe infectious diseases to people with substance use disorders; a systematic review
Vold, Jørn Henrik; Aas, Christer Frode; Leiva, Rafael Alexander Mo; Vickerman, Peter; Chalabianloo, Fatemeh; Løberg, Else-Marie; Johansson, Kjell Arne; Fadnes, Lars T. (Peer reviewed; Journal article, 2019)Background: Various integrated care models have been used to improve treatment completion of medications for chronic hepatitis B virus (HBV), chronic hepatitis C virus (HCV), Mycobacterium tuberculosis (TB), and Human ... -
Integrated treatment of hepatitis C virus infection among people who inject drugs: A multicenter randomized controlled trial (INTRO-HCV)
Fadnes, Lars T.; Aas, Christer Frode; Vold, Jørn Henrik; Leiva, Rafael Alexander Mo; Ohldieck, Christian; Chalabianloo, Fatemeh; Skurtveit, Svetlana Ondrasova; Lygren, Ole Jørgen; Dalgard, Olav; Vickerman, Peter; Midgard, Håvard; Løberg, Else-Marie; Johansson, Kjell Arne (Journal article; Peer reviewed, 2021)Background The standard pathways of testing and treatment for hepatitis C virus (HCV) infection in tertiary healthcare are not easily accessed by people who inject drugs (PWID). The aim of this study was to evaluate the ... -
Integrated treatment of hepatitis C virus infection among people who inject drugs: study protocol for a randomised controlled trial (INTRO-HCV)
Fadnes, Lars T.; Aas, Christer Frode; Vold, Jørn Henrik; Ohldieck, Christian; Leiva, Rafael Alexander Mo; Chalabianloo, Fatemeh; Skurtveit, Svetlana; Lygren, Ole Jørgen; Dalgard, Olav; Vickerman, Peter; Midgard, Håvard; Løberg, Else-Marie; Johansson, Kjell Arne (Peer reviewed; Journal article, 2019-11-08)Background: A large proportion of people who inject drugs (PWID) living with hepatitis C virus (HCV) infection have not been treated. It is unknown whether inclusion of HCV diagnostics and treatment into integrated substance ... -
On the path towards universal coverage of hepatitis C treatment among people receiving opioid agonist therapy (OAT) in Norway: A prospective cohort study from 2013 to 2017
Aas, Christer Frode; Vold, Jørn Henrik; Skurtveit, Svetlana; Odsbu, Ingvild; Chalabianloo, Fatemeh; Økland, Jan-Magnus; Leiva, Rafael Alexander Mo; Vickerman, Peter; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2020)Objectives We aimed to calculate cumulative hepatitis C virus (HCV) treatment coverage among individuals enrolled in opioid agonist therapy (OAT) in Norway between 2013 and 2017 and to document the treatment transition to ... -
Potentially addictive drugs dispensing to patients receiving opioid agonist therapy: a register-based prospective cohort study in Norway and Sweden from 2015 to 2017
Vold, Jørn Henrik; Aas, Christer Frode; Skurtveit, Svetlana; Odsbu, Ingvild; Chalabianloo, Fatemeh; Reutfors, Johan; Halmøy, Anne; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2020)Objectives: To compare the use of benzodiazepines, z-hypnotics, gabapentinoids, opioids and centrally acting stimulants (CAS) among patients who had received opioid agonist therapy (OAT) in Norway and Sweden during the ... -
Prevalence and correlates of suicide attempts in high-risk populations: a cross-sectional study among patients receiving opioid agonist therapy in Norway
Vold, Jørn Henrik; Løberg, Else-Marie; Aas, Christer Frode; Steier, Jan Alexander; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2022)Background Death by suicide in patients enrolled in opioid agonist therapy (OAT) is a major clinical concern. However, little knowledge exists regarding suicide attempts in this patient group. This study presents the ... -
Subjective symptoms and serum methadone concentrations: what should guide dose adjustments in methadone maintenance treatment? A naturalistic cohort study from Norway
Chalabianloo, Fatemeh; Fadnes, Lars T.; Høiseth, Gudrun; Ohldieck, Christian; Vold, Jørn Henrik; Aas, Christer Frode; Løberg, Else-Marie; Johansson, Kjell Arne; Bramness, Jørgen Gustav (Journal article; Peer reviewed, 2021)Background: There is little evidence-based guidance on how to optimize methadone dosages among patients with opioid addiction undergoing methadone maintenance treatment (MMT). This study aims to investigate whether ... -
Substance use and symptoms of mental health disorders: a prospective cohort of patients with severe substance use disorders in Norway
Aas, Christer Frode; Vold, Jørn Henrik; Gjestad, Rolf; Skurtveit, Svetlana; Lim, Aaron G.; Gjerde, Kristian Varden; Løberg, Else-Marie; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2021-02-27)Background:There is high co-occurrence of substance use disorders (SUD) and mental health disorders. We aimedto assess impact of substance use patterns and sociodemographic factors on mental health distress using the ...