Concepedia

Author

J. O. Johannessen

Oslo University Hospital

Also Known As

J O Johannessen, J. O. Johannessen, Jan Olav Johannessen

15

Publications

968

Citations

11

H-Index

16

Concepts

All Affiliations

Oslo University HospitalUniversity of OsloYale UniversityStavanger University HospitalUniversity of Copenhagen
JO

About

J. O. Johannessen is an author at Oslo University Hospital specializing in schizophrenia, psychopathology, and psychiatry.

Top Concepts

#ConceptH-IndexPublicationsCitations

1

Medicine

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43

2

Social Sciences

2

2

43

3

Psychiatry

2

2

43

4

Psychology

2

2

43

5

Rehabilitation

1

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23

J. O. Johannessen

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10

Publications

750

Citations

10

H-Index

YearCitations

First-episode schizophrenia with long duration of untreated psychosis: Pathways to care

Tor Ketil Larsen, J. O. Johannessen, Stein Opjordsmoen

The British Journal of Psychiatry

1998

209

Early Detection of First-Episode Psychosis: The Effect on 1-Year Outcome

Tor Ketil Larsen, Ingrid Melle, B. Auestad,

Schizophrenia Bulletin

2005

132

Methodological pitfalls in early detection studies – the NAPE Lecture 2002

Svein Friis, Tor Ketil Larsen, Ingrid Melle,

Acta Psychiatrica Scandinavica

2003

93

Clinical epidemiologic first‐episode psychosis: 1‐year outcome and predictors

Erik Simonsen, Svein Friis, Ulrik Haahr,

Acta Psychiatrica Scandinavica

2007

83

Reducing the duration of untreated first‐episode psychosis – effects on baseline social functioning and quality of life

Ingrid Melle, Ulrik Haahr, Svein Friis,

Acta Psychiatrica Scandinavica

2005

62

A 2‐year follow‐up of involuntary admission’s influence upon adherence and outcome in first‐episode psychosis

Stein Opjordsmoen, Svein Friis, Ingrid Melle,

Acta Psychiatrica Scandinavica

2010

58

Does duration of untreated psychosis bias study samples of first‐episode psychosis?

Svein Friis, Ingrid Melle, Tor Ketil Larsen,

Acta Psychiatrica Scandinavica

2004

46

Are multi family groups appropriate for patients with first episode psychosis? A 5‐year naturalistic follow‐up study

J. O. Johannessen, Stein Opjordsmoen, Julie Evensen,

Acta Psychiatrica Scandinavica

2010

24

The Development of Subjective Quality of Life Over the First 2 Years in First-Episode Psychosis

Ingrid Melle, Jan Ivar Røssberg, Inge Joa,

The Journal of Nervous and Mental Disease

2010

23

Innovations: Psychoeducation: Multifamily Group Treatment in a Program for Patients With First-Episode Psychosis: Experiences From the TIPS Project

A. Fjell, Gerd Ragna Bloch Thorsen, Svein Friis,

Psychiatric Services

2007

20

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