Jan Olav Johannessen

Stavanger University Hospital — Norway

Medicine · Health Sciences

39h-index5.8kcitations157works1.32yr avg
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Research Topics

Schizophrenia research and treatment(112), Mental Health and Psychiatry(59), Bipolar Disorder and Treatment(25), Mental Health Treatment and Access(22), Psychosomatic Disorders and Their Treatments(18)

Publications156 total

Trauma‐Focused Treatment in Psychosis: A Systematic Review
Early Intervention in Psychiatry·2025· 2 cited
Trauma-Focused Treatment in Psychosis: A Systematic Review
2024Open Access
Implementing Clinical Guidelines for the Treatment of Psychosis: The Frontline Leaders’ Point of View. A Qualitative Study
Journal of Healthcare Leadership·2024· 2 citedOpen Access
Association between early suicidal trajectories in first-episode psychosis and 10-year follow-up: TIPS registry-linked study
The Lancet Psychiatry·2023· 13 citedOpen Access
Johan Christoffer Cullberg (6th January 1934–14th June 2022)<sup>1</sup>
Early Intervention in Psychiatry·2022
Psychiatric patients’ attitudes towards being hospitalized: a national multicentre study in Norway
BMC Psychiatry·2022· 6 citedOpen Access
Johan Christoffer Cullberg
Psychosis·2022
Associations between symptom and neurocognitive dimensions in clinical high risk for psychosis
Schizophrenia Research Cognition·2022· 3 citedOpen Access
Reduced Expression of Emotion: A Red Flag Signalling Conversion to Psychosis in Clinical High Risk for Psychosis (CHR-P) Populations
Psychiatry·2022· 5 citedOpen Access
Parents' perspectives on user participation and shared decision‐making in adolescents' inpatient mental healthcare
Health Expectations·2022· 28 citedOpen Access
Childhood trauma, antipsychotic medication, and symptom remission in first-episode psychosis
Psychological Medicine·2021· 7 citedOpen Access
Modern understanding of psychosis: from brain disease to stress disorder. And some other important aspects of psychosis…
Psychosis·2021· 13 citedOpen Access
Cognitive predictors of longitudinal positive symptom course in clinical high risk for psychosis
Schizophrenia Research Cognition·2021· 5 citedOpen Access
Childhood interpersonal trauma and premorbid social adjustment as predictors of symptom remission in first episode psychosis
Schizophrenia Research·2021· 9 citedOpen Access
Exploring specific predictors of psychosis onset over a 2‐year period: A decision‐tree model
Early Intervention in Psychiatry·2021· 8 citedOpen Access
The Effect of Intensive Implementation Support on Fidelity for Four Evidence-Based Psychosis Treatments: A Cluster Randomized Trial
Administration and Policy in Mental Health and Mental Health Services Research·2021· 20 citedOpen Access
Early Detection of Ultra High Risk for Psychosis in a Norwegian Catchment Area: The Two Year Follow-Up of the Prevention of Psychosis Study
Frontiers in Psychiatry·2021· 17 citedOpen Access
One-Year Outcome and Adherence to Pharmacological Guidelines in First-Episode Schizophrenia
Journal of Clinical Psychopharmacology·2020· 11 citedOpen Access
The Family Psychoeducation Fidelity Scale: Psychometric Properties
Administration and Policy in Mental Health and Mental Health Services Research·2020· 13 citedOpen Access
An exploratory study of the experiences of being both a mental health professional and carer in mental health services in Norway
Journal of Psychiatric and Mental Health Nursing·2020· 1 citedOpen Access
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Frequent Co-authors

Tor Ketil Larsen(41), Inge Joa(33), Ingrid Melle(31), Erik Simonsen(30), Svein Friis(29), Stein Opjordsmoen(29), Thomas H. McGlashan(29), Per Vaglum(26), Bjørn Rishovd Rund(23), Ulrik Haahr(21), Wenche ten Velden Hegelstad(18), Johannes Langeveld(16), Jan Ivar Røssberg(15), Julie Evensen(12), Helene Eidsmo Barder(10), Bjørn Auestad(7), Kjetil Sundet(5), Kolbjørn Brønnick(5), Per Vaglum(4), Henry J. Jackson(4)