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Dive into the research topics where Johannes Langeveld is active.

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Featured researches published by Johannes Langeveld.


American Journal of Psychiatry | 2012

Long-Term Follow-Up of the TIPS Early Detection in Psychosis Study: Effects on 10-Year Outcome

Wenche ten Velden Hegelstad; Tor Ketil Larsen; Bjørn Auestad; Julie Evensen; Ulrik Haahr; Inge Joa; Jan Olav Johannesen; Johannes Langeveld; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Kjetil Sundet; Per Vaglum; Svein Friis; Thomas H. McGlashan

OBJECTIVE Early detection in first-episode psychosis confers advantages for negative, cognitive, and depressive symptoms after 1, 2, and 5 years, but longitudinal effects are unknown. The authors investigated the differences in symptoms and recovery after 10 years between regional health care sectors with and without a comprehensive program for the early detection of psychosis. METHOD The authors evaluated 281 patients (early detection, N=141) 18 to 65 years old with a first episode of nonaffective psychosis between 1997 and 2001. Of these, 101 patients in the early-detection area and 73 patients in the usual-detection area were followed up at 10 years, and the authors compared their symptoms and recovery. RESULTS A significantly higher percentage of early-detection patients had recovered at the 10-year follow-up relative to usual-detection patients. This held true despite more severely ill patients dropping out of the study in the usual-detection area. Except for higher levels of excitative symptoms in the early-detection area, there were no symptom differences between the groups. Early-detection recovery rates were higher largely because of higher employment rates for patients in this group. CONCLUSIONS Early detection of first-episode psychosis appears to increase the chances of milder deficits and superior functioning. The mechanisms by which this strategy improves the long-term prognosis of psychosis remain speculative. Nevertheless, our findings over 10 years may indicate that a prognostic link exists between the timing of intervention and outcome that deserves additional study.


Acta Psychiatrica Scandinavica | 2009

Baseline profiles of adolescent vs. adult-onset first-episode psychosis in an early detection program.

Inge Joa; Jan Olav Johannessen; Johannes Langeveld; Svein Friis; Ingrid Melle; Stein Opjordsmoen; Erik Simonsen; Per Vaglum; T. McGlashan; Tor Ketil Larsen

Objective:  Psychotic disorders often start in adolescence. We aim to investigate premorbid and baseline differences characterizing patients with an onset of psychosis in adolescence versus adulthood.


European Child & Adolescent Psychiatry | 2007

Parent–youth discrepancy in the assessment and treatment of youth in usual clinical care setting: consequences to parent involvement

Pravin Israel; Per Hove Thomsen; Johannes Langeveld; Kjell Morten Stormark

BackgroundInvolving parents in the treatment of youth referred for mental health problems is an important agenda. Parent involvement is associated with treatment retention, greater family participation, and positive outcomes. The main goal of the present study was to examine the role of youth and parent report of the youth’s psychopathology and interpersonal problems on parent involvement in outpatient treatment of the youth.MethodsData were gathered from 63 referred youth in treatment in an outpatient clinic. Subjects reported the youth’s interpersonal problems and problem syndromes. The direct account of the youth and parents was examined for association with two indices of parent involvement, namely, the mothers’ behavioral involvement (BI) and personal emotional involvement (PEI) in the treatment process.ResultsResults showed that while direct reports of the youth and parents were not significant predictors of parent involvement, discrepancy scores predicted parent involvement. Further, there were twice as many scales of interpersonal problems that were related to parent involvement as the syndrome scales.ConclusionThe ability of discrepancy scores in predicting parent involvement underscores that it is not only a risk factor for later development of adverse outcomes, but also related with essential treatment processes. Clinicians may be able to address these issues and aid in treatment processes leading to desired outcomes.


Schizophrenia Bulletin | 2015

Neurocognition and Duration of Psychosis: A 10-year Follow-up of First-Episode Patients

Bjørn Rishovd Rund; Helene Eidsmo Barder; Julie Evensen; Ulrik Haahr; Wenche ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; Johannes Langeveld; Tor Ketil Larsen; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Erik Simonsen; Kjetil Sundet; Per Vaglum; Thomas H. McGlashan; Svein Friis

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. Duration of untreated psychosis (DUP), accumulated time in psychosis the first year after start of treatment, relapse rates and symptoms are potential predictors of the long-term course. In this study, 261 first-episode psychosis patients were assessed neuropsychologically on one or more occasions. Patients were tested after remission of psychotic symptoms and reassessed 1, 2, 5, and 10 years after inclusion. The neurocognitive battery consisted of California Verbal Learning Test, Wisconsin Card Sorting Test, Controlled Oral Word Association Task, Trail Making A and B, and Finger Tapping. We calculated a composite score by adding the z-scores of 4 tests that were only moderately inter-correlated, not including Finger Tapping. Data were analyzed by a linear mixed model. The composite score was stable over 10 years. No significant relationship between psychosis before (DUP) or after start of treatment and the composite score was found, providing no support for the neurotoxicity hypothesis, and indicating that psychosis before start of treatment has no significant impact on the course and outcome in psychosis. We found no association between symptoms and the neurocognitive trajectory. Stable remission during the first year predicted neurocognitive functioning, suggesting that the early clinical course is a good predictor for the long-term course.


Schizophrenia Bulletin | 2014

Impact of Interpersonal Trauma on the Social Functioning of Adults With First-Episode Psychosis

Helen J. Stain; Kolbjørn Brønnick; Wenche ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; Johannes Langeveld; Lauren Mawn; Tor Ketil Larsen

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. METHOD A first-episode psychosis sample aged 15-65 years (N = 233) completed measures of social functioning (Lehmans Quality of Life Interview and Strauss Carpenter Functioning Scale) and trauma (Brief Betrayal Trauma Survey), as well as clinical assessments. RESULTS Childhood trauma (any type) was associated with poorer premorbid functioning and was experienced by 61% of our sample. There were no associations with clinical symptoms. Interpersonal trauma in childhood was a significant predictor of social functioning satisfaction in adulthood, but this was not the case for interpersonal trauma in adulthood. However, 45% of adults who reported childhood interpersonal trauma also experienced adulthood interpersonal trauma. CONCLUSION Our results emphasize the importance of early relationship experience such as interpersonal trauma, on the social functioning of adults with psychosis. We recommend extending our research by examining the impact of interpersonal childhood trauma on occupational functioning in psychosis.


Frontiers in Human Neuroscience | 2013

Ten year neurocognitive trajectories in first-episode psychosis

Helene Eidsmo Barder; Kjetil Sundet; Bjørn Rishovd Rund; Julie Evensen; Ulrik Haahr; Wenche ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; Johannes Langeveld; Tor Ketil Larsen; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Erik Simonsen; Per Vaglum; Thomas H. McGlashan; Svein Friis

Objective: Neurocognitive impairment is commonly reported at onset of psychotic disorders. However, the long-term neurocognitive course remains largely uninvestigated in first episode psychosis (FEP) and the relationship to clinically significant subgroups even more so. We report 10 year longitudinal neurocognitive development in a sample of FEP patients, and explore whether the trajectories of cognitive course are related to presence of relapse to psychosis, especially within the first year, with a focus on the course of verbal memory. Method: Forty-three FEP subjects (51% male, 28 ± 9 years) were followed-up neurocognitively over five assessments spanning 10 years. The test battery was divided into four neurocognitive indices; Executive Function, Verbal Learning, Motor Speed, and Verbal Fluency. The sample was grouped into those relapsing or not within the first, second and fifth year. Results: The four neurocognitive indices showed overall stability over the 10 year period. Significant relapse by index interactions were found for all indices except Executive Function. Follow-up analyses identified a larger significant decrease over time for the encoding measure within Verbal Memory for patients with psychotic relapse in the first year [F(4, 38) = 5.8, p = 0.001, η2 = 0.40]. Conclusions: Main findings are long-term stability in neurocognitive functioning in FEP patients, with the exception of verbal memory in patients with psychotic relapse or non-remission early in the course of illness. We conclude that worsening of specific parts of cognitive function may be expected for patients with on-going psychosis, but that the majority of patients do not show significant change in cognitive performance during the first 10 years after being diagnosed.


Scandinavian Journal of Psychology | 2013

Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first‐episode psychosis?

Johannes Langeveld; Ole A. Andreassen; Bjørn Auestad; Ann Faerden; Lars Johan Hauge; Inge Joa; Jan Olav Johannessen; Ingrid Melle; Bjørn Rishovd Rund; Jan Ivar Røssberg; Erik Simonsen; Per Vaglum; Tor Ketil Larsen

The Positive and Negative Syndrome Scale (PANSS) is the most widely used scale to assess a variety of symptoms in patients with schizophrenia and other psychoses. The factor structure of the PANSS has been examined with confirmatory factor analyses in several studies, but not in a well-defined first-episode psychosis sample. The aim of this paper is to examine the statistical fit of five different PANSS models in a first-episode, non-affective psychosis sample. Confirmatory factor analyses were performed on PANSS data (n = 588). A main criterion for best fit was defined as the Expected Cross Validation Index (ECVI). No tested model revealed an optimally satisfactory model fit index. The Wallwork/Fortgang five-factor model demonstrated the most optimal psychometric properties. The corresponding subscales of all evaluated five-factor models were strongly intercorrelated. The Wallwork/Fortgang five-factor model was found to be statistically and clinically ideal among patients with first-episode psychosis. Therefore, we recommend this model in forthcoming studies among patients with first-episode psychosis. However, to prevent the loss of clinically valuable information on an item level, we do not recommend removing any items from the original form. Our study also implies that the specific choice of model will not have a substantial effect on outcome results in studies on the course and outcome in first-episode psychosis.


Schizophrenia Research | 2014

Treatment and violent behavior in persons with first episode psychosis during a 10-year prospective follow-up study.

Johannes Langeveld; Stål Bjørkly; Bjørn Auestad; Helene Eidsmo Barder; Julie Evensen; Wenche ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; Tor Ketil Larsen; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H. McGlashan; Svein Friis

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. METHOD A prospective design was used with comprehensive assessments of criminal behavior, drug abuse, clinical, social and treatment variables at baseline, five, and 10-year follow-up. Additionally, threatening and violent behavior was assessed at 10-year follow-up. A clinical epidemiological sample of first-episode psychosis patients (n=178) was studied. RESULTS During the 10-year follow-up period, 20% of subjects had been apprehended or incarcerated. At 10-year follow-up, 15% of subjects had exposed others to threats or violence during the year before assessment. Illegal drug use at baseline and five-year follow-up, and a longer duration of psychotic symptoms were found to be predictive of violent behavior during the year preceding the 10-year follow-up. CONCLUSION After treatment initiation, the overall prevalence of violence in psychotic patients drops gradually to rates close to those of the general population. However, persistent illicit drug abuse is a serious risk factor for violent behavior, even long after the start of treatment. Achieving remission early and reducing substance abuse may contribute to a lower long-term risk for violent behavior in FEP patients.


Psychiatric Services | 2016

Early Predictors of Ten-Year Course in First-Episode Psychosis

Svein Friis; Ingrid Melle; Jan Olav Johannessen; Jan Ivar Røssberg; Helene Eidsmo Barder; Julie Evensen; Ulrik Haahr; Wenche ten Velden Hegelstad; Inge Joa; Johannes Langeveld; Tor Ketil Larsen; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H. McGlashan

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. Specialized mental health personnel evaluated patients at baseline, three months, and one, two, five, and ten years (N=186 at ten years). Time in psychosis was defined as time with scores ≥4 on any of the Positive and Negative Syndrome Scale items P1, P3, P5, P6, and G9. Evaluations were retrospective, based on clinical interviews and all available clinical information. During the first two years, patients were also evaluated by their clinicians at least biweekly. Baseline and early-course predictors of long-term course were identified with linear mixed-model analyses. RESULTS Four variables provided significant, additive predictions of longer time in psychosis during the ten-year follow-up: deterioration in premorbid social functioning, duration of untreated psychosis (DUP) of ≥26 weeks, core schizophrenia spectrum disorder, and no remission within three months. CONCLUSIONS First-episode psychosis patients should be followed carefully after the start of treatment. If symptoms do not remit within three months with adequate treatment, there is a considerable risk of a poor long-term outcome, particularly for patients with a deterioration in premorbid social functioning, a DUP of at least half a year, and a diagnosis within the core schizophrenia spectrum.


Schizophrenia Research | 2016

Subjective quality of life in first-episode psychosis. A ten year follow-up study

Erlend Strand Gardsjord; Kristin Lie Romm; Svein Friis; Helene Eidsmo Barder; Julie Evensen; Ulrik Haahr; Wenche ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; Johannes Langeveld; Tor Ketil Larsen; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H. McGlashan; Ingrid Melle; Jan Ivar Røssberg

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. At 10 year follow-up 186 patients participated. QoL was measured by the Lehmans Quality of Life Interview. Linear mixed model analyses were performed to investigate longitudinal effects of baseline psychiatric symptoms and socio-economic variables and the effects of changes in the same variables on S-QoL-development. RESULTS S-QoL improved significantly over the follow-up period. More contact with family and a better financial situation at baseline had a positive and longstanding effect on S-QoL-development, but changes in these variables were not associated with S-QoL-development. Higher depressive symptoms and less daily activities at baseline both had a negative independent effect, but a positive interaction effect with time on S-QoL-development indicating that the independent negative effect diminished over time. In the change analysis, increased daily activities and a decrease in depressive symptoms were associated with a positive S-QoL-development. CONCLUSIONS Treatment of depressive symptoms and measures aimed at increasing daily activities seem important to improve S-QoL in patients with psychosis. More contact with family and a better financial situation at baseline have a long-standing effect on S-QoL-development in FEP patients.

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Inge Joa

Stavanger University Hospital

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Jan Olav Johannessen

Stavanger University Hospital

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Erik Simonsen

Oslo University Hospital

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