Publications by authors named "Johannes Langeveld"

Aim: The aim of this paper is to present 25 years of clinical experience with family psychoeducation (FPE) work at Stavanger University Hospital in Norway, highlighting the lessons learned in overcoming implementation barriers in publicly funded specialized mental health care.

Methods: This retrospective analysis reviews the integration and sustainability of FPE work within the hospital's standard treatment protocols for psychosis, tracing its origins from the Early Treatment and Intervention in Psychosis (TIPS) study (1997-2000) to its current application. The paper examines key strategies for successful implementation, including staff training and resource allocation, as emphasized by international research.

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Introduction: Clinical high risk for psychosis (CHR) is associated with mild cognitive impairments. Symptoms are clustered into positive, negative and disorganization symptoms. The association between specific symptom dimensions and cognitive functions remains unclear.

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: In this hypothesis-testing study, which is based on findings from a previous atheoretical machine-learning study, we test the predictive power of baseline "reduced expression of emotion" for psychosis.: Study participants (N = 96, mean age 16.55 years) were recruited from the Prevention of Psychosis Study in Rogaland, Norway.

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Background: Clinical High Risk (CHS) for psychosis is a state in which positive symptoms are predominant but do not reach a level of severity that fulfils the criteria for a psychotic episode. The aim of this study has been to investigate whether cognition in subjects with newly detected CHR affects the longitudinal development of positive symptoms.

Methods: Fifty-three CHR individuals fulfilling the criteria for attenuated positive syndrome in the Structural Interview for Prodromal Syndromes (SIPS) were included.

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Aim: The fluctuating symptoms of clinical high risk for psychosis hamper conversion prediction models. Exploring specific symptoms using machine-learning has proven fruitful in accommodating this challenge. The aim of this study is to explore specific predictors and generate atheoretical hypotheses of onset using a close-monitoring, machine-learning approach.

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Background: Interpersonal problems are consistently identified with psychopathology that often has its onset in adolescence. Most of the commonly used instruments in child and adolescent psychiatry target non-interpersonal problems. The Inventory of Interpersonal Problems (IIP) is a widely studied and utilized instrument in the adult mental health field.

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Most individuals experience a relatively long period of sub-clinical psychotic like symptoms, known as the ultra high risk (UHR) or at risk mental states (ARMS), prior to a first episode of psychosis. Approximately 95% of individuals who will later develop psychosis are not referred to specialized clinical services and assessed during the UHR phase. The study aimed to investigate whether a systematic early detection program, modeled after the successful early detection of psychosis program TIPS, would improve the detection of help-seeking UHR individuals.

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Background: Subjective quality of life (S-QoL) is an important outcome measure in first-episode psychosis, but its associations with clinical predictors may vary across the illness course. In this study we examine the association pattern, including both direct and indirect effects, between specific predefined clinical predictors (insight, depression, positive psychotic symptoms and global functioning) and S-QoL the first ten years after a first-episode psychosis.

Methods: Three hundred and one patients with a first-episode psychosis were included at first treatment, and reassessed at 3 months, 1 year, 2 years, 5 years and 10 years after inclusion.

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Aim: Individual placement and support (IPS) for first episode psychosis (FEP) has proven effective for employment and education, but yields differing results across geographical regions. Local adaptations may be necessary for various reasons, such as regional differences in employment- and welfare services; in educational opportunities and job markets. The aim of this study was to investigate the efficacy of an adapted Norwegian intervention offering early IPS for education and employment to persons with FEP.

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Violent victimization in persons with severe mental illness has long-term adverse consequences. Little is known about the long-term prevalence of victimization in first episode psychosis, or about factors affecting victimization throughout the course of illness. To assess the prevalence of violent victimization during a 10-year follow-up period in a group of first episode psychosis (FEP) patients, and to identify early predictors and risk factors for victimization.

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Purpose: The role of compulsory treatment of serious mental disorders has been the topic of ongoing public debate involving among others mental health professionals, service providers, service user advocates, relatives of service users, media commentators and politicians. However, relatively little is known about general public attitudes towards involuntary admission and compulsory treatment of people with various mental disorders. This article examines the attitudes in a representative sample of Norway's population towards the use of involuntary admission and treatment, and under which circumstances does the general public consider compulsory treatment to be justified in the Norwegian mental health care services.

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Background: Quality of life is an important outcome measure for patients with psychosis. We investigated whether going into stable symptomatic remission is associated with a more positive development of subjective quality of life (S-QoL) and if different patient characteristics are associated with S-QoL depending on remission status.

Methods: Three hundred and one patients with a first-episode psychosis were included at baseline.

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Background: There is lack of long-term controlled studies evaluating treatment effects of antipsychotic medication. A complete investigation should include the service user perspective.

Aims: To investigate experiences of clinically recovered service users of antipsychotic medications during and after a first episode of psychosis.

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Predictors of long-term symptomatic remission are crucial to the successful tailoring of treatment in first episode psychosis. There is lack of studies distinguishing the predictive effects of different social factors. This prevents a valid evaluating of their independent effects.

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Objective: This study tested the hypothesis that early detection of psychosis improves long-term vocational functioning through the prevention of negative symptom development.

Methods: Generalized estimating equations and mediation analysis were conducted to examine the association between employment and negative symptoms over ten years among patients in geographic areas characterized by usual detection (N=140) or early detection (N=141) of psychosis.

Results: Improved vocational outcome after ten years among patients in the early-detection area was mediated by lower levels of negative symptoms during the first five years.

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Background: Hallucinations are a core diagnostic criterion for psychotic disorders and have been investigated with regard to its association with childhood trauma in first-episode psychosis samples. Research has largely focused on auditory hallucinations, while specific investigations of visual hallucinations in first-episode psychosis remain scarce.

Objectives: The aims of this study were to describe the prevalence of visual hallucinations, and to explore the association between visual hallucination and childhood trauma in a first-episode psychosis sample.

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Unlabelled: Subjective quality of life (S-QoL) is an important outcome measure in first episode psychosis (FEP). The aims of this study were to describe S-QoL-development the first 10-years in FEP patients and to identify predictors of this development.

Methods: A representative sample of 272 patients with a first episode psychotic disorder was included from 1997 through 2000.

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Aim: Interpersonal traumas are highly prevalent in patients with psychotic disorders. Trauma caused by those close to the patient might have a more profound impact than other types of trauma and may influence early life social functioning. The aim is to investigate the associations between different types of trauma, in particular close interpersonal traumas experienced before the age of 18, premorbid factors and baseline clinical characteristics in a sample of first-episode psychosis patients.

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Objective: Identifying patients at risk of poor outcome at an early stage of illness can aid in treatment planning. This study sought to create a best-fit statistical model of known baseline and early-course risk factors to predict time in psychosis during a ten-year follow-up period after a first psychotic episode.

Methods: Between 1997 and 2000, 301 patients with DSM-IV nonorganic, nonaffective first-episode psychosis were recruited consecutively from catchment area-based sectors in Norway and Denmark.

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A substantial proportion of schizophrenia-spectrum patients exhibit a cognitive impairment at illness onset. However, the long-term course of neurocognition and a possible neurotoxic effect of time spent in active psychosis, is a topic of controversy. Furthermore, it is of importance to find out what predicts the long-term course of neurocognition.

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A substantial proportion of patients suffering from schizophrenia-spectrum disorders (SSDs) exhibit a general intellectual impairment at illness onset, but the subsequent intellectual course remains unclear. Relationships between accumulated time in psychosis and long-term intellectual functioning are largely uninvestigated, but may identify subgroups with different intellectual trajectories. Eighty-nine first-episode psychosis patients were investigated on IQ at baseline and at 10-years follow-up.

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Background: First episode psychosis (FEP) patients have an increased risk for violence and criminal activity prior to initial treatment. However, little is known about the prevalence of criminality and acts of violence many years after implementation of treatment for a first episode psychosis.

Aim: To assess the prevalence of criminal and violent behaviors during a 10-year follow-up period after the debut of a first psychosis episode, and to identify early predictors and concomitant risk factors of violent behavior.

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Background: Auditory verbal hallucinations are a characteristic symptom in schizophrenia. Recent causal models of auditory verbal hallucinations propose that cognitive mechanisms involving verbal working memory are involved in the genesis of auditory verbal hallucinations. Thus, in the present study, we investigate the hypothesis that verbal working memory is a specific factor behind auditory verbal hallucinations.

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Background: Social functioning is an important treatment outcome for psychosis, and yet, we know little about its relationship to trauma despite high rates of trauma in people with psychosis. Childhood trauma is likely to disrupt the acquisition of interpersonal relatedness skills including the desire for affiliation and thus lead to impaired social functioning in adulthood.

Aims: We hypothesized that childhood trauma would be a predictor of poor social functioning for adults with psychosis and that further trauma in adulthood would moderate this relationship.

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