Elizabeth Ann Barrett

• ClinPsych I PhD
• Oslo University Hospital

Background Shared decision-making between clinicians and service users is crucial in mental health care. One significant barrier to achieving this goal is the lack of user-centered services. Integrating digital tools into mental health services holds promise for addressing some of these challenges. However, the implementation of digital tools, such...

BACKGROUND Strengthening shared decision-making in mental healthcare may improve quality of services and treatment outcomes, but its implementation in services for severe mental disorders is currently lacking. OBJECTIVE This study aims to explore the feasibility and acceptability of the mobile app iTandem as a digital tool promoting shared decisio...

BACKGROUND Shared decision-making between clinicians and service users is crucial in mental health care. One significant barrier to achieving this goal is the lack of user-centered services. Integrating digital tools into mental health services holds promise for addressing some of these challenges. However, the implementation of digital tools, such...

Background: The use of alcohol and nicotine can negatively impact the course of bipolar disorder (BD), but there is limited knowledge about how symptoms and sleep disturbances is related to concurrent nicotine use and non-pathological use of alcohol. Methods: We investigated how nicotine use and non-pathological use of alcohol relates to affecti...

Introduction The illness course of bipolar disorder (BD) is highly heterogeneous with substantial variation between individuals with the same BD subtype and within individuals over time. This heterogeneity is not well-delineated and hampers the development of more targeted treatment. Furthermore, although lifestyle-related behaviors are believed to...

Background Informal care is vital to many people with severe mental illness under normal circumstances. Little is known about how extraordinary circumstances affect relatives with a family member with mental illness. This study investigated the consequences of the first COVID-19 lockdown in Norway from the perspective of relatives of persons with p...

Introduction The COVID‐19 pandemic affects people globally, but it may affect people with psychotic and bipolar disorders disproportionally. Our aims were to investigate the pandemic impact on perceived wellbeing and mental health in this population, including which pandemic‐related factors have had an impact. Methods People with psychotic and bip...

Background Many relatives of people with psychotic and bipolar disorders experience a high caregiver burden normally. During the first COVID-19 lockdown, mental health services partly shut down in many countries. The impact on relatives is unknown. Aims Explore how relatives of people with psychotic and bipolar disorders experienced changes in tre...

Background: Duration of untreated psychosis (DUP) is associated with outcome in psychotic disorders and influenced by contextual factors such as immigration. Here we aimed to investigate the effect of mental health literacy (MHL) on duration of untreated psychosis considering the influence of migration and education. Methods: A total of 269 partici...

Background A range of sleep disturbances are commonly experienced by patients with psychiatric disorders, and genome-wide genetic analyses have shown some significant genetic correlations between these traits. Here we applied novel statistical genetic methodologies to better characterize the potential shared genetic architecture between sleep-relat...

Substance misuse is highly prevalent in bipolar disorder even in the early illness phases. However, the trajectories of misuse of different substances after treatment initiation is not well-studied. Also, knowledge on how substance misuse trajectories influence the early course of bipolar disorder is limited. We recruited 220 individuals in first t...

Background: Sleep disturbances are prevalent in people with psychosis and are related to several negative outcomes. Recent research indicates that sleep disturbances contribute to the development of psychosis and is therefore an important treatment target. Despite this, a study found that sleep problems in people with psychosis were mostly assesse...

Sleep disturbances and cognitive impairments are both frequent across psychotic disorders, with debilitating effects on functioning and quality of life. This study aims to investigate if sleep disturbances are related to cognitive impairments in schizophrenia spectrum (SCZ) and bipolar disorders (BD), if this relationship varies between different s...

Background The experience of childhood trauma is linked to more severe symptoms and poorer functioning in severe mental disorders; however, the mechanisms behind this are poorly understood. We investigate the relationship between childhood trauma and sleep disturbances in severe mental disorders including the role of sleep disturbances in mediating...

Objectives: Perceived/experienced stigma and its relationship with clinical outcome were investigated across the first year of treatment in a large sample with first-episode psychosis (FEP). Methods: FEP participants (n=112) in the TOP study were investigated at baseline and 1-year follow-up. Perceived/experienced stigma was measured with items...

Background: Sleep disturbances are prevalent in severe mental disorders but their type and frequency across diagnostic categories has not been investigated in large scale studies. Methods: Participants with Schizophrenia spectrum disorders (SCZ, (N = 617)), Bipolar disorders (BD, (N = 440)), and Healthy Controls (HC, (N = 173)) were included in...

The aim of this study is to investigate the validity of the Norwegian version of the Insight Scale (IS) in large and representative samples of patients with schizophrenia spectrum disorders, bipolar I disorder and bipolar II disorder. A total of 997 participants were included (schizophrenia spectrum disorders: 557; bipolar I disorder: 282; bipolar...

Aim: Lack of insight into illness is frequent in psychotic disorders and seen as part of their primary pathology. The recognition of symptoms as psychotic, and beliefs about treatment alternatives, is also influenced by socio-cultural factors. Here we examined clinical insight into illness and beliefs about psychosis in immigrants in their first ep...

Insight into psychosis has been linked to suicidality, although inconsistently. The co-variation between insight and suicidality over time is under-investigated. The aim of the present study was to investigate predictors of suicidality in patients with first episode of psychosis (FEP) over one year, focusing on the relationship between insight and...

To investigate whether schizophrenia patients with both suicide attempts and non-suicidal self-harm have earlier age of onset of psychotic and depressive symptoms and higher levels of clinical symptoms compared to patients with only suicide attempts or without suicide attempt. Using a cross-sectional design, 251 patients (18--61 years old, 58% men)...

Background Previous studies in bipolar disorder investigating childhood trauma and clinical presentations of the illness have mainly focused on physical and sexual abuse. Our aim was to explore further the relationship between childhood trauma and disease characteristics in bipolar disorder to determine which clinical characteristics were most stro...

This study describes the prevalence, clinical characteristics, and gender profile of self-harm in a cross-sectional sample of 388 patients with schizophrenia spectrum disorders. All patients were interviewed and assessed with respect to lifetime self-harm and relevant clinical variables. An overall of 49% of the patients reported self-harm which wa...

Suicidal behavior and suicide is prevalent in schizophrenia, with an estimated lifetime risk of approximately 5%. The risk is particularly high in the early phases of the disorder, and especially during the years around treatment initiation. Suicide attempts before first treatment contact are also prevalent, with the risk of suicide attempt associa...

The aim of this study was to investigate whether suicide attempters had higher IQ, better executive functioning, or were more impulsive as measured by neuropsychological tests than non-attempters in a group of patients with schizophrenia spectrum disorders. One hundred seventy-four patients with schizophrenia spectrum disorders were assessed with a...

Our objective was to examine the cortisol release during a mental challenge in severe mental disorders versus healthy controls (HC), analyzing effects of sex, clinical characteristics and medication, and comparing Bipolar Disorder (BD) to Schizophrenia (SCZ). Patients with BD and SCZ (n=151) were recruited from a catchment area. HC (n=98) were rand...

The hypothalamic-pituitary-adrenal (HPA) axis seems dysregulated and part of the pathophysiology in bipolar disorder and schizophrenia, but the underlying mechanisms are unknown. Recent evidence indicates that systemic cortisol metabolism influences blood cortisol levels and HPA axis functioning. Our objective was to estimate systemic cortisol meta...

Dysfunction of the hypothalamic-pituitary-adrenal (HPA) axis is documented in bipolar disorder and schizophrenia, but the mechanism is unclear; recently, increased activity of cortisol metabolizing enzymes was indicated in these disorders. We investigated whether five genes involved in cortisol metabolism were associated with altered activity of co...

Suicidal behaviour is prevalent in psychotic disorders. Insight has been found to be associated with increased risk for suicidal behaviour, but not consistently. A possible explanation for this is that insight has different consequences for patients depending on their beliefs about psychosis. The present study investigated whether a relationship be...

The suicide risk in psychotic disorders is highest in the early phases of illness. Studies have typically focused on suicidality from treatment start rather than actual onset of psychosis. This study explored the prevalence and characteristics of suicidality in patients with a first episode of psychosis (FEP) in two time intervals: 1) prior to stud...

The high rate of drug abuse among patients with psychosis represents a challenge to clinicians in their treatment of the patients. Powerful screening tools to detect problematic drug use in an early phase of psychotic illness are needed. The aim of the present study was to investigate prevalence of drug use disorders and psychometric properties of...

The aims of this study were to examine the prevalence and pattern of lifetime Diagnostic and Structural Manual of Mental Disorders (fourth version) major depressive episodes, and the relationship between patient characteristics and current severity of depressive symptoms in first episode psychosis patients (FEPP). A total of 122 FEPP from the ongoi...

This study aimed to determine which patient characteristics are associated with higher levels of apathy, to what degree first-episode psychosis patients are apathetic compared with a healthy control group, and to what degree apathy and other symptoms (including negative subsymptoms) influence functioning in first-episode psychosis. The Norwegian Th...

Early onset of bipolar disorder (BD) is an important clinical predictor of a more severe course and poorer outcome. A higher proportion of childhood onset BD has been reported in studies from USA compared to Europe. We investigated age at onset of first affective episode in a Norwegian sample and compared it to previous European and US findings. In...

This study describes how the negative subsyndrome of apathy develops over the first year in first episode psychosis (FEP) patients, with an emphasis on the prevalence of enduring apathy and the relationship between apathy, other symptoms and functioning. Eighty four FEP patients were assessed both at baseline and after one year with the abridged cl...

The underlying nature of negative symptoms in psychosis is poorly understood. Investigation of the relationship between the different negative subsymptoms and neurocognition is one approach to understand more of the underlying nature. Apathy, one of the subsymptoms, is also a common symptom in other brain disorders. Its association with neurocognit...

Recently there has been a renewed interest in defining the boundaries and subdomains of the negative syndrome in schizophrenia and new scales have been asked for. Apathy is one of the symptoms in focus. The Apathy Evaluation Scale (AES) with its clinical version (AES-C) is one of the most used scales in an interdisciplinary context, but it has neve...