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Erik Simonsen

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Johannes Langeveld; Ole A Andreassen; Bjørn Auestad; Ann Færden; Lars Johan Hauge; Inge Joa; Jan Olav Johannessen; Ingrid Melle; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Tor K Larsen
Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis?
Wenche Ten Velden Hegelstad; Per Vaglum; Bjørn Auestad; Helene Barder; Julie Evensen; Ulrik Haahr; Inge Joa; Jan O Johannessen; Johannes Langeveld; Tor K Larsen; Thomas McGlashan; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Rossberg; Bjørn Rishovd Rund; Erik Simonsen; Svein Friis
Early detection, early symptom progression and symptomatic remission after ten years in a first episode of psychosis study.
Johannes Langeveld; Bjørn Auestad; Svein Friis; Inge Joa; Jan O Johannessen; Thomas McGlashan; Ingrid Melle; Stein Opjordsmoen; Erik Simonsen; Wenche ten Velden Hegelstad; Per Vaglum; Tor K Larsen
A comparison of adolescent- and adult-onset first-episode, non-affective psychosis: 2-year follow-up.

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All Publications

2013: Johannes Langeveld; Ole A Andreassen; Bjørn Auestad; Ann Færden; Lars Johan Hauge; Inge Joa; Jan Olav Johannessen; Ingrid Melle; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Tor K Larsen
Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis?
Scandinavian journal of psychology 2013;54(2):160-5.
2013: Wenche Ten Velden Hegelstad; Per Vaglum; Bjørn Auestad; Helene Barder; Julie Evensen; Ulrik Haahr; Inge Joa; Jan O Johannessen; Johannes Langeveld; Tor K Larsen; Thomas McGlashan; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Rossberg; Bjørn Rishovd Rund; Erik Simonsen; Svein Friis
Early detection, early symptom progression and symptomatic remission after ten years in a first episode of psychosis study.
Schizophrenia research 2013;143(2-3):337-43.
2012: Johannes Langeveld; Bjørn Auestad; Svein Friis; Inge Joa; Jan O Johannessen; Thomas McGlashan; Ingrid Melle; Stein Opjordsmoen; Erik Simonsen; Wenche ten Velden Hegelstad; Per Vaglum; Tor K Larsen
A comparison of adolescent- and adult-onset first-episode, non-affective psychosis: 2-year follow-up.
European archives of psychiatry and clinical neuroscience 2012;262(7):599-605.
2012: Svein Friis; Ulrik Haahr; Wenche Ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; Johannes Langeveld; Tor K Larsen; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Kjetil Sundet; Per Vaglum; Helene Barder; Julie Horgen Evensen; Thomas McGlashan
The TIPS study and bias: replies to Dr Amos.
The Australian and New Zealand journal of psychiatry 2012;46(9):905-7.
2012: Julie Evensen; Helene Barder; Ulrik Haahr; Wenche Ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; Tor K Larsen; Thomas McGlashan; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Svein Friis
Flat affect and social functioning: a 10 year follow-up study of first episode psychosis patients.
Schizophrenia research 2012;139(1-3):99-104.
2012: Wenche Ten Velden Hegelstad; Inge Joa; Jan O Johannesen; Johannes Langeveld; Tor K Larsen; Bjørn Auestad; Julie Evensen; Svein Friis; Ulrik Haahr; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Rossberg; Bjørn Rishovd Rund; Erik Simonsen; Kjetil Sundet; Per Vaglum; Thomas McGlashan
Long-term follow-up of the TIPS early detection in psychosis study: effects on 10-year outcome.
The American journal of psychiatry 2012;169(4):374-80.
2012: Julie Evensen; Svein Friis; Ulrik Haahr; Wenche ten Velden Hegelstad; Inge Joa; Jan Olav Johannessen; T K Larsen; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Kjetil Sundet; Per Vaglum; Helene Barder; Thomas McGlashan
Apathy in first episode psychosis patients: a ten year longitudinal follow-up study.
Schizophrenia research 2012;136(1-3):19-24.
2011: Marte Tandberg; Torill Ueland; Per Vaglum; Svein Friis; Ulrik Haahr; Inge Joa; Jan Olav Johannessen; Tor Ketil Larsen; Ingrid Melle; Stein Opjordsmoen; Jan Ivar Røssberg; Bjørn Rishovd Rund; Erik Simonsen; Kjetil Sundet; Thomas McGlashan
Neurocognition and occupational functioning in patients with first-episode psychosis: a 2-year follow-up study.
Psychiatry research 2011;188(3):334-42.
2011: T K Larsen; Ingrid Melle; B Auestad; Ulrik Haahr; Inge Joa; Jan Olav Johannessen; Stein Opjordsmoen; Bjørn Rishovd Rund; J I Rossberg; Erik Simonsen; Per Vaglum; Svein Friis; Thomas H McGlashan
Early detection of psychosis: positive effects on 5-year outcome.
Psychological medicine 2011;41(7):1461-9.
2011: Jan Olav Johannessen; Inge Joa; Bjørn Auestad; Ulrik Haahr; Tor K Larsen; Ingrid Melle; Stein Opjordsmoen; Per Simonsen; Bjørn R Rund; Erik Simonsen; Per Vaglum; Svein Friis; Thomas McGlashan
First-episode psychosis patients recruited into treatment via early detection teams versus ordinary pathways: course and health service use during 5 years.
Early intervention in psychiatry 2011;5(1):70-5.
2009: Stein Opjordsmoen; Ingrid Melle; Svein Friis; Ulrik Haahr; Jan O Johannessen; Tor K Larsen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Stability of medication in early psychosis: a comparison between second-generation and low-dose first-generation antipsychotics.
Early intervention in psychiatry 2009;3(1):58-65.
2008: Ingrid Melle; Tor K Larsen; Ulrik Haahr; Svein Friis; Jan O Johannesen; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas McGlashan
Prevention of negative symptom psychopathologies in first-episode schizophrenia: two-year effects of reducing the duration of untreated psychosis.
Archives of general psychiatry 2008;65(6):634-40.
2008: Inge Joa; Jan Olav Johannessen; Bjørn Auestad; Svein Friis; Thomas McGlashan; Ingrid Melle; Stein Opjordsmoen; Erik Simonsen; Per Vaglum; Tor K Larsen
The key to reducing duration of untreated first psychosis: information campaigns.
Schizophrenia bulletin 2008;34(3):466-72.
2007: Tor K Larsen; Ingrid Melle; Svein Friis; Inge Joa; Jan Olav Johannessen; Stein Opjordsmoen; Erik Simonsen; Per Vaglum; Thomas H McGlashan
One-year effect of changing duration of untreated psychosis in a single catchment area.
The British journal of psychiatry. Supplement 2007;51():s128-32.
2007: Inge Joa; Jan Olav Johannessen; Bjørn Auestad; Svein Friis; Stein Opjordsmoen; Erik Simonsen; Per Vaglum; Thomas McGlashan; Tor K Larsen
Effects on referral patterns of reducing intensive informational campaigns about first-episode psychosis.
Early intervention in psychiatry 2007;1(4):340-5.
2007: Hanne-Grethe Lyse; Ulrik Helt Haahr; Anne Fjell; Bente Dichmann; Estrid Flensborg; Erik Simonsen
[Psychoeducation and multifamily groups for patients with first-episode psychosis].
Ugeskrift for laeger 2007;169(43):3668-72.
2007: Erik Simonsen; Svein Friis; Ulrik Haahr; Jan Olav Johannessen; Tor K Larsen; Ingrid Melle; Stein Opjordsmoen; Bjørn Rishovd Rund; Per Vaglum; Thomas H McGlashan
Clinical epidemiologic first-episode psychosis: 1-year outcome and predictors.
Acta psychiatrica Scandinavica 2007;116(1):54-61.
2007: Erik Simonsen; Ulrik Helt Haahr; Morten Kjølbye; Per Sørensen
[Personality disorders].
Ugeskrift for laeger 2007;169(21):2002-5.
2007: Bjørn Rishovd Rund; Ingrid Melle; Svein Friis; Jan Olav Johannessen; Tor K Larsen; Liv Jaeger Midbøe; Stein Opjordsmoen; Erik Simonsen; Per Vaglum; Thomas H McGlashan
The course of neurocognitive functioning in first-episode psychosis and its relation to premorbid adjustment, duration of untreated psychosis, and relapse.
Schizophrenia research 2007;91(1-3):132-40.
2007: Jan O Johannessen; Svein Friis; Inge Joa; Ulrik Haahr; Tor K Larsen; Ingrid Melle; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas McGlashan
First-episode psychosis patients recruited into treatment via early detection teams versus ordinary pathways: course, outcome and health service use during first 2 years.
Early intervention in psychiatry 2007;1(1):40-8.
2007: Anne Fjell; Gerd Ragna Bloch Thorsen; Svein Friis; Jan Olav Johannessen; Tor K Larsen; Kari Lie; Hanne-Grethe Lyse; Ingrid Melle; Erik Simonsen; Nina Aarhus Smeby; Anne Lise Øxnevad; William R McFarlane; Per Vaglum; Thomas H McGlashan
Multifamily group treatment in a program for patients with first-episode psychosis: experiences from the TIPS project.
Psychiatric services (Washington, D.C.) 2007;58(2):171-3.
2006: Tor K Larsen; Ingrid Melle; Bjørn Auestad; Svein Friis; Ulrik Haahr; Jan Olav Johannessen; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Substance abuse in first-episode non-affective psychosis.
Schizophrenia research 2006;88(1-3):55-62.
2006: Tor K Larsen; Ingrid Melle; Bjørn Auestad; Svein Friis; Ulrik Haahr; Jan Olav Johannessen; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Early detection of first-episode psychosis: the effect on 1-year outcome.
Schizophrenia bulletin 2006;32(4):758-64.
2006: Ingrid Melle; Jan Olav Johannesen; Svein Friis; Ulrik Haahr; Inge Joa; Tor K Larsen; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Early detection of the first episode of schizophrenia and suicidal behavior.
The American journal of psychiatry 2006;163(5):800-4.
2005: Ingrid Melle; Ulrik Haahr; Svein Friis; K Hustoft; Jan Olav Johannessen; Tor K Larsen; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Reducing the duration of untreated first-episode psychosis -- effects on baseline social functioning and quality of life.
Acta psychiatrica Scandinavica 2005;112(6):469-73.
2005: Ingrid Melle; Svein Friis; Ulrik Haahr; J O Johannesen; Tor K Larsen; Stein Opjordsmoen; J I Roessberg; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Measuring quality of life in first-episode psychosis.
European psychiatry : the journal of the Association of European Psychiatrists 2005;20(7):474-83.
2005: Svein Friis; Per Vaglum; Ulrik Haahr; Jan Olav Johannessen; Tor K Larsen; Ingrid Melle; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Thomas H McGlashan
Effect of an early detection programme on duration of untreated psychosis: part of the Scandinavian TIPS study.
The British journal of psychiatry. Supplement 2005;48():s29-32.
2005: Jan Olav Johannessen; Tor K Larsen; Inge Joa; Ingrid Melle; Svein Friis; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Pathways to care for first-episode psychosis in an early detection healthcare sector: part of the Scandinavian TIPS study.
The British journal of psychiatry. Supplement 2005;48():s24-8.
2004: Svein Friis; Ingrid Melle; Tor K Larsen; Ulrik Haahr; Jan Olav Johannessen; Erik Simonsen; Stein Opjordsmoen; Per Vaglum; Thomas H McGlashan
Does duration of untreated psychosis bias study samples of first-episode psychosis?
Acta psychiatrica Scandinavica 2004;110(4):286-91.
2004: Tor K Larsen; Svein Friis; Ulrik Haahr; Jan Olav Johannessen; Ingrid Melle; Stein Opjordsmoen; Bjørn Rishovd Rund; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Premorbid adjustment in first-episode non-affective psychosis: distinct patterns of pre-onset course.
The British journal of psychiatry : the journal of mental science 2004;185():108-15.
2004: Bjørn Rishovd Rund; Ingrid Melle; Svein Friis; Tor K Larsen; Liv Jaeger Midbøe; Stein Opjordsmoen; Erik Simonsen; Per Vaglum; Thomas H McGlashan
Neurocognitive dysfunction in first-episode psychosis: correlates with symptoms, premorbid adjustment, and duration of untreated psychosis.
The American journal of psychiatry 2004;161(3):466-72.
2004: Ingrid Melle; Tor K Larsen; Ulrik Haahr; Svein Friis; Jan Olav Johannessen; Stein Opjordsmoen; Erik Simonsen; Bjørn Rishovd Rund; Per Vaglum; Thomas H McGlashan
Reducing the duration of untreated first-episode psychosis: effects on clinical presentation.
Archives of general psychiatry 2004;61(2):143-50.
2003: Svein Friis; Tor K Larsen; Ingrid Melle; Stein Opjordsmoen; Jan Olav Johannessen; Ulrik Haahr; Erik Simonsen; Bjørn Rishovd Rund; Per Vaglum; Thomas H McGlashan
Methodological pitfalls in early detection studies - the NAPE Lecture 2002. Nordic Association for Psychiatric Epidemiology.
Acta psychiatrica Scandinavica 2003;107(1):3-9.
2001: Tor K Larsen; Thomas H McGlashan; Jan Olav Johannessen; Svein Friis; C Guldberg; Ulrik Haahr; Marthe Horneland; Ingrid Melle; L C Moe; Stein Opjordsmoen; Erik Simonsen; Per Vaglum
Shortened duration of untreated first episode of psychosis: changes in patient characteristics at treatment.
The American journal of psychiatry 2001;158(11):1917-9.
2001: Jan Olav Johannessen; Thomas H McGlashan; Tor K Larsen; Marthe Horneland; Inge Joa; S Mardal; R Kvebaek; Svein Friis; Ingrid Melle; Stein Opjordsmoen; Erik Simonsen; H Ulrik; Per Vaglum
Early detection strategies for untreated first-episode psychosis.
Schizophrenia research 2001;51(1):39-46.
2001: Tor K Larsen; Svein Friis; Ulrik Haahr; Inge Joa; Jan Olav Johannessen; Ingrid Melle; Stein Opjordsmoen; Erik Simonsen; Per Vaglum
Early detection and intervention in first-episode schizophrenia: a critical review.
Acta psychiatrica Scandinavica 2001;103(5):323-34.