Svein Friis
Position: Head physician
Phone: 229 23755
Email:
 

Publications 2017

Falkum E, Klungsøyr O, Lystad JU, Bull HC, Evensen S, Martinsen EW, Friis S, Ueland T (2017)
Vocational rehabilitation for adults with psychotic disorders in a Scandinavian welfare society
BMC Psychiatry, 17 (1), 24
PubMed 28095813

Furre A, Falk RS, Sandvik L, Friis S, Knutzen M, Hanssen-Bauer K (2017)
Characteristics of adolescents frequently restrained in acute psychiatric units in Norway: a nationwide study
Child Adolesc Psychiatry Ment Health, 11, 3
PubMed 28096898

Gardsjord ES, Romm KL, Røssberg JI, Friis S, Barder HE, Evensen J, Haahr U, Ten Velden Hegelstad W, Joa I, Johannessen JO, Langeveld J, Larsen TK, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T, Melle I (2017)
Is going into stable symptomatic remission associated with a more positive development of life satisfaction? A 10-year follow-up study of first episode psychosis
Schizophr Res (in press)
PubMed 28701275

Melle I, Olav Johannesen J, Haahr UH, Ten Velden Hegelstad W, Joa I, Langeveld J, Larsen TK, Ilner Opjordsmoen S, Qin P, Ivar Røssberg J, Rishovd Rund B, Simonsen E, Vaglum PJW, McGlashan TH, Friis S (2017)
Causes and predictors of premature death in first-episode schizophrenia spectrum disorders
World Psychiatry, 16 (2), 217-218
PubMed 28498600

Weibell MA, Hegelstad WTV, Auestad B, Bramness J, Evensen J, Haahr U, Joa I, Johannessen JO, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T, McGorry P, Friis S (2017)
The Effect of Substance Use on 10-Year Outcome in First-Episode Psychosis
Schizophr Bull, 43 (4), 843-851
PubMed 28199703

Publications 2016

Dahl HS, Ulberg R, Friis S, Perry JC, Høglend PA (2016)
Therapists' Inadequate Feelings and Long-Term Effect of Transference Work
Psychother Psychosom, 85 (5), 309-10
PubMed 27513346

Furre A, Sandvik L, Friis S, Knutzen M, Hanssen-Bauer K (2016)
A nationwide study of why and how acute adolescent psychiatric units use restraint
Psychiatry Res, 237, 60-6
PubMed 26921053

Gardsjord ES, Romm KL, Friis S, Barder HE, Evensen J, Haahr U, ten Velden Hegelstad W, Joa I, Johannessen JO, Langeveld J, Larsen TK, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T, Melle I, Røssberg JI (2016)
Subjective quality of life in first-episode psychosis. A ten year follow-up study
Schizophr Res, 172 (1-3), 23-8
PubMed 26947210

Guloksuz S, Li F, Tek C, Woods SW, McGlashan TH, Friis S, Srihari VH (2016)
Analyzing the Duration of Untreated Psychosis: Quantile Regression
JAMA Psychiatry, 73 (10), 1094-1095
PubMed 27580422

Hegelstad WT, Bronnick KS, Barder HE, Evensen JH, Haahr U, Joa I, Johannessen JO, Langeveld J, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Rossberg JI, Simonsen E, Vaglum PW, McGlashan TH, Friis S (2016)
Preventing Poor Vocational Functioning in Psychosis Through Early Intervention
Psychiatr Serv, 68 (1), 100-103
PubMed 27582238

Haahr UH, Larsen TK, Simonsen E, Rund BR, Joa I, Rossberg JI, Johannessen JO, Langeveld J, Evensen J, Trauelsen AM, Vaglum P, Opjordsmoen S, Hegelstad WT, Friis S, McGlashan T, Melle I (2016)
Relation between premorbid adjustment, duration of untreated psychosis and close interpersonal trauma in first-episode psychosis
Early Interv Psychiatry (in press)
PubMed 26800653

Publications 2015

Bendiksen B, Aase H, Diep LM, Svensson E, Friis S, Zeiner P (2015)
The Associations Between Pre- and Postnatal Maternal Symptoms of Distress and Preschooler's Symptoms of ADHD, Oppositional Defiant Disorder, Conduct Disorder, and Anxiety
J Atten Disord (in press)
PubMed 26647350

Friis S (2015)
[Seclusion--punishment or support?]
Tidsskr Nor Laegeforen, 135 (1), 8
PubMed 25589099

Friis S, Melle I, Johannessen JO, Røssberg JI, Barder HE, Evensen JH, Haahr U, Ten Velden Hegelstad W, Joa I, Langeveld J, Larsen TK, Opjordsmoen S, Rund BR, Simonsen E, Vaglum PW, McGlashan TH (2015)
Early Predictors of Ten-Year Course in First-Episode Psychosis
Psychiatr Serv, 67 (4), 438-43
PubMed 26567932

Nilsen L, Norheim I, Frich JC, Friis S, Røssberg JI (2015)
Challenges for group leaders working with families dealing with early psychosis: a qualitative study
BMC Psychiatry, 15, 141
PubMed 26134829

Rund BR, Barder HE, Evensen J, Haahr U, ten Velden Hegelstad W, Joa I, Johannessen JO, Langeveld J, Larsen TK, Melle I, Opjordsmoen S, Røssberg JI, Simonsen E, Sundet K, Vaglum P, McGlashan T, Friis S (2015)
Neurocognition and Duration of Psychosis: A 10-year Follow-up of First-Episode Patients
Schizophr Bull, 42 (1), 87-95
PubMed 26101305

Publications 2014

Barder HE, Sundet K, Rund B, Evensen J, Haahr U, Hegelstad W, Joa I, Johannessen JO, Langeveld J, Larsen TK, Melle I, Opjordsmoen S, Rossberg JI, Simonsen E, Vaglum P, McGlashan T, Friis S (2014)
Ten year neurocognitive trajectories in first-episode psychosis (vol 7, pg 643, 2013)
Front. Hum. Neurosci., 8, 319

Bendiksen B, Svensson E, Aase H, Reichborn-Kjennerud T, Friis S, Myhre AM, Zeiner P (2014)
Co-Occurrence of ODD and CD in Preschool Children With Symptoms of ADHD
J Atten Disord, 21 (9), 741-752
PubMed 24994876

Bull H, Ueland T, Lystad JU, Evensen S, Friis S, Martinsen EW, Falkum E (2014)
Validation of the work behavior inventory
Nord J Psychiatry, 69 (4), 300-6
PubMed 25393653

Furre A, Sandvik L, Heyerdahl S, Friis S, Knutzen M, Hanssen-Bauer K (2014)
Characteristics of adolescents subjected to restraint in acute psychiatric units in Norway: a case-control study
Psychiatr Serv, 65 (11), 1367-72
PubMed 24980114

Knutzen M, Bjorkly S, Eidhammer G, Lorentzen S, Mjosund NH, Opjordsmoen S, Sandvik L, Friis S (2014)
Characteristics of patients frequently subjected to pharmacological and mechanical restraint - A register study in three Norwegian acute psychiatric wards (vol 215, pg 127, 2014)
Psychiatry Res., 219 (3), 714

Langeveld J, Bjørkly S, Auestad B, Barder H, Evensen J, Ten Velden Hegelstad W, Joa I, Johannessen JO, Larsen TK, Melle I, Opjordsmoen S, Røssberg JI, Rund BR, Simonsen E, Vaglum P, McGlashan T, Friis S (2014)
Treatment and violent behavior in persons with first episode psychosis during a 10-year prospective follow-up study
Schizophr Res, 156 (2-3), 272-6
PubMed 24837683

Nilsen L, Frich JC, Friis S, Norheim I, Røssberg JI (2014)
Participants' perceived benefits of family intervention following a first episode of psychosis: a qualitative study
Early Interv Psychiatry, 10 (2), 152-9
PubMed 24861325

Nilsen L, Frich JC, Friis S, Røssberg JI (2014)
Patients' and family members' experiences of a psychoeducational family intervention after a first episode psychosis: a qualitative study
Issues Ment Health Nurs, 35 (1), 58-68
PubMed 24350752

Sönmez N, Røssberg JI, Evensen J, Barder HE, Haahr U, Ten Velden Hegelstad W, Joa I, Johannessen JO, Langeveld H, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T, Friis S (2014)
Depressive symptoms in first-episode psychosis: a 10-year follow-up study
Early Interv Psychiatry, 10 (3), 227-33
PubMed 24956976

Publications 2013

Barder HE, Sundet K, Rund BR, Evensen J, Haahr U, Ten Velden Hegelstad W, Joa I, Johannessen JO, Langeveld H, Larsen TK, Melle I, Opjordsmoen S, Røssberg JI, Simonsen E, Vaglum P, McGlashan T, Friis S (2013)
Neurocognitive development in first episode psychosis 5 years follow-up: associations between illness severity and cognitive course
Schizophr Res, 149 (1-3), 63-9
PubMed 23810121

Barder HE, Sundet K, Rund BR, Evensen J, Haahr U, Ten Velden Hegelstad W, Joa I, Johannessen JO, Langeveld J, Larsen TK, Melle I, Opjordsmoen S, Røssberg JI, Simonsen E, Vaglum P, McGlashan T, Friis S (2013)
Ten year neurocognitive trajectories in first-episode psychosis
Front Hum Neurosci, 7, 643
PubMed 24109449

Faerden A, Barrett EA, Nesvåg R, Friis S, Finset A, Marder SR, Ventura J, Andreassen OA, Agartz I, Melle I (2013)
Apathy, poor verbal memory and male gender predict lower psychosocial functioning one year after the first treatment of psychosis
Psychiatry Res, 210 (1), 55-61
PubMed 23489592

Knutzen M, Bjørkly S, Eidhammer G, Lorentzen S, Mjøsund NH, Opjordsmoen S, Sandvik L, Friis S (2013)
Characteristics of patients frequently subjected to pharmacological and mechanical restraint--a register study in three Norwegian acute psychiatric wards
Psychiatry Res, 215 (1), 127-33
PubMed 24230996

ten Velden Hegelstad W, Joa I, Barder H, Evensen J, Haahr U, Johannessen JO, Langeveld J, Melle I, Opjordsmoen S, Røssberg JI, Rund BR, Simonsen E, Vaglum P, McGlashan T, Friis S, Larsen TK (2013)
Variation in duration of untreated psychosis in an 18-year perspective
Early Interv Psychiatry, 8 (4), 323-31
PubMed 23773272

Publications 2012

Evensen J, Røssberg JI, Barder H, Haahr U, Hegelstad Wt, Joa I, Johannessen JO, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Simonsen E, Sundet K, Vaglum P, Friis S, McGlashan T (2012)
Apathy in first episode psychosis patients: a ten year longitudinal follow-up study
Schizophr Res, 136 (1-3), 19-24
PubMed 22285655

Evensen J, Røssberg JI, Barder H, Haahr U, Hegelstad WT, Joa I, Johannessen JO, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T, Friis S (2012)
Flat affect and social functioning: a 10 year follow-up study of first episode psychosis patients
Schizophr Res, 139 (1-3), 99-104
PubMed 22627124

Friis S (2012)
[Can you be cured from schizophrenia?]
Tidsskr Nor Laegeforen, 132 (7), 847-8
PubMed 22511103

Friis S, Barder H, Evensen JH, Haahr U, Hegelstad WT, Joa I, Johannessen JO, Langeveld J, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Røssberg JI, Simonsen E, Sundet K, Vaglum P, McGlashan T (2012)
The TIPS study and bias: replies to Dr Amos
Aust N Z J Psychiatry, 46 (9), 905-7
PubMed 22956571

Friis S, Kvåle A, Opjordsmoen S, Bunkan BH (2012)
The Global Body Examination (GBE). A useful instrument for evaluation of respiration
Adv Physiother, 14 (4), 146-154
PubMed 23243389

Hegelstad WT, Larsen TK, Auestad B, Evensen J, Haahr U, Joa I, Johannesen JO, Langeveld J, Melle I, Opjordsmoen S, Rossberg JI, Rund BR, Simonsen E, Sundet K, Vaglum P, Friis S, McGlashan T (2012)
Long-term follow-up of the TIPS early detection in psychosis study: effects on 10-year outcome
Am J Psychiatry, 169 (4), 374-80
PubMed 22407080

Haahr U, Simonsen E, Røssberg JI, Johannessen JO, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Vaglum P, Friis S, McGlashan T (2012)
Patient satisfaction with treatment in first-episode psychosis
Nord J Psychiatry, 66 (5), 329-35
PubMed 22250962

Knutzen M, Bjørkly S, Eidhammer G, Lorentzen S, Helen Mjøsund N, Opjordsmoen S, Sandvik L, Friis S (2012)
Mechanical and pharmacological restraints in acute psychiatric wards--why and how are they used?
Psychiatry Res, 209 (1), 91-7
PubMed 23219102

Langeveld J, Joa I, Friis S, ten Velden Hegelstad W, Melle I, Johannessen JO, Opjordsmoen S, Simonsen E, Vaglum P, Auestad B, McGlashan T, Larsen TK (2012)
A comparison of adolescent- and adult-onset first-episode, non-affective psychosis: 2-year follow-up
Eur Arch Psychiatry Clin Neurosci, 262 (7), 599-605
PubMed 22441715

Ten Velden Hegelstad W, Haahr U, Larsen TK, Auestad B, Barder H, Evensen J, Joa I, Johannessen JO, Langeveld J, Melle I, Opjordsmoen S, Rossberg JI, Rund BR, Simonsen E, Vaglum P, McGlashan T, Friis S (2012)
Early detection, early symptom progression and symptomatic remission after ten years in a first episode of psychosis study
Schizophr Res, 143 (2-3), 337-43
PubMed 23219862

Publications 2011

Engh JA, Sundet K, Simonsen C, Vaskinn A, Lagerberg TV, Opjordsmoen S, Friis S, Andreassen OA (2011)
Verbal learning contributes to cognitive insight in schizophrenia independently of affective and psychotic symptoms
Prog Neuropsychopharmacol Biol Psychiatry, 35 (4), 1059-63
PubMed 21392553

Evensen J, Røssberg JI, Haahr U, ten Velden Hegelstad W, Joa I, Johannessen JO, Langeveld H, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Simonsen E, Sundet K, Vaglum P, Friis S, McGlashan T (2011)
Contrasting monosymptomatic patients with hallucinations and delusions in first-episode psychosis patients: a five-year longitudinal follow-up study
Psychopathology, 44 (2), 90-7
PubMed 21228615

Knutzen M, Mjosund NH, Eidhammer G, Lorentzen S, Opjordsmoen S, Sandvik L, Friis S (2011)
Characteristics of psychiatric inpatients who experienced restraint and those who did not: a case-control study
Psychiatr Serv, 62 (5), 492-7
PubMed 21532074

Kvåle A, Bunkan BH, Opjordsmoen S, Friis S (2011)
Development of the movement domain in the global body examination
Physiother Theory Pract, 28 (1), 41-9
PubMed 21682584

Nesvold H, Ormstad K, Friis S (2011)
To be used or not to be used, that is the question: legal use of forensic and clinical information collected in a self-referral sexual assault centre
J Forensic Sci, 56 (5), 1156-62
PubMed 21827469

Nesvold H, Ormstad K, Friis S (2011)
Sexual assault centres and police reporting--an important arena for medical/legal interaction
J Forensic Sci, 56 (5), 1163-9
PubMed 21827470

Tandberg M, Ueland T, Sundet K, Haahr U, Joa I, Johannessen JO, Larsen TK, Opjordsmoen S, Rund BR, Røssberg JI, Simonsen E, Vaglum P, Melle I, Friis S, McGlashan T (2011)
Neurocognition and occupational functioning in patients with first-episode psychosis: a 2-year follow-up study
Psychiatry Res, 188 (3), 334-42
PubMed 21575993

Publications 2010

Faerden A, Finset A, Friis S, Agartz I, Barrett EA, Nesvåg R, Andreassen OA, Marder SR, Melle I (2010)
Apathy in first episode psychosis patients: one year follow up
Schizophr Res, 116 (1), 20-6
PubMed 19948392

Friis S (2010)
Early specialised treatment for first-episode psychosis: does it make a difference?
Br J Psychiatry, 196 (5), 339-40
PubMed 20435954

Friis S (2010)
Untitled
Acta Psychiatr. Scand., 121 (1), 79

Johannessen JO, Joa I, Auestad B, Haahr U, Larsen TK, Melle I, Opjordsmoen S, Simonsen P, Rund BR, Simonsen E, Vaglum P, Friis S, McGlashan T (2010)
First-episode psychosis patients recruited into treatment via early detection teams versus ordinary pathways: course and health service use during 5 years
Early Interv Psychiatry, 5 (1), 70-5
PubMed 21272278

Jónsdóttir H, Opjordsmoen S, Birkenaes AB, Engh JA, Ringen PA, Vaskinn A, Aamo TO, Friis S, Andreassen OA (2010)
Medication adherence in outpatients with severe mental disorders: relation between self-reports and serum level
J Clin Psychopharmacol, 30 (2), 169-75
PubMed 20520290

Melle I, Johannessen JO, Friis S, Haahr U, Joa I, Larsen TK, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T (2010)
Course and predictors of suicidality over the first two years of treatment in first-episode schizophrenia spectrum psychosis
Arch Suicide Res, 14 (2), 158-70
PubMed 20455151

Melle I, Røssberg JI, Joa I, Friis S, Haahr U, Johannessen JO, Larsen TK, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T (2010)
The development of subjective quality of life over the first 2 years in first-episode psychosis
J Nerv Ment Dis, 198 (12), 864-9
PubMed 21135636

Rossberg JI, Karterud S, Pedersen G, Friis S (2010)
Psychiatric symptoms and countertransference feelings: an empirical investigation
Psychiatry Res, 178 (1), 191-5
PubMed 20452056

Simonsen C, Sundet K, Vaskinn A, Ueland T, Romm KL, Hellvin T, Melle I, Friis S, Andreassen OA (2010)
Psychosocial function in schizophrenia and bipolar disorder: Relationship to neurocognition and clinical symptoms
J Int Neuropsychol Soc, 16 (5), 771-83
PubMed 20509984

Publications 2009

Birkenaes AB, Birkeland KI, Friis S, Opjordsmoen S, Andreassen OA (2009)
Hormonal markers of metabolic dysregulation in patients with severe mental disorders after olanzapine treatment under real-life conditions
J Clin Psychopharmacol, 29 (2), 109-16
PubMed 19512971

Engh JA, Friis S, Birkenaes AB, Jónsdóttir H, Klungsøyr O, Ringen PA, Simonsen C, Vaskinn A, Opjordsmoen S, Andreassen OA (2009)
Delusions are associated with poor cognitive insight in schizophrenia
Schizophr Bull, 36 (4), 830-5
PubMed 19176474

Faerden A, Friis S, Agartz I, Barrett EA, Nesvåg R, Finset A, Melle I (2009)
Apathy and functioning in first-episode psychosis
Psychiatr Serv, 60 (11), 1495-503
PubMed 19880468

Faerden A, Vaskinn A, Finset A, Agartz I, Ann Barrett E, Friis S, Simonsen C, Andreassen OA, Melle I (2009)
Apathy is associated with executive functioning in first episode psychosis
BMC Psychiatry, 9, 1
PubMed 19133132

Friis S (2009)
Psychosis
Acta Psychiatr Scand, 121 (1), 79; author reply 79-80
PubMed 19895622

Opjordsmoen S, Melle I, Friis S, Haahr U, Johannessen JO, Larsen TK, Rund BR, Simonsen E, Vaglum P, McGlashan TH (2009)
Stability of medication in early psychosis: a comparison between second-generation and low-dose first-generation antipsychotics
Early Interv Psychiatry, 3 (1), 58-65
PubMed 21352176

Simonsen C, Sundet K, Vaskinn A, Birkenaes AB, Engh JA, Faerden A, Jónsdóttir H, Ringen PA, Opjordsmoen S, Melle I, Friis S, Andreassen OA (2009)
Neurocognitive dysfunction in bipolar and schizophrenia spectrum disorders depends on history of psychosis rather than diagnostic group
Schizophr Bull, 37 (1), 73-83
PubMed 19443616

Vaskinn A, Sundet K, Friis S, Ueland T, Simonsen C, Birkenaes AB, Engh JA, Jónsdóttir H, Opjordsmoen S, Ringen PA, Andreassen OA (2009)
Using the Wisconsin Card Sorting Test to assess learning potential in normal IQ schizophrenia: does it have potential?
Nord J Psychiatry, 63 (5), 405-11
PubMed 19365785

Vaskinn A, Sundet K, Hultman CM, Friis S, Andreassen OA (2009)
Social problem-solving in high-functioning schizophrenia: specific deficits in sending skills
Psychiatry Res, 165 (3), 215-23
PubMed 19136154

Publications 2008

Birkenaes AB, Birkeland KI, Engh JA, Faerden A, Jonsdottir H, Ringen PA, Friis S, Opjordsmoen S, Andreassen OA (2008)
Dyslipidemia independent of body mass in antipsychotic-treated patients under real-life conditions
J Clin Psychopharmacol, 28 (2), 132-7
PubMed 18344722

Bringager CB, Friis S, Arnesen H, Dammen T (2008)
Nine-year follow-up of panic disorder in chest pain patients: clinical course and predictors of outcome
Gen Hosp Psychiatry, 30 (2), 138-46
PubMed 18291295

Bringager CB, Gauer K, Arnesen H, Friis S, Dammen T (2008)
Nonfearful panic disorder in chest-pain patients: status after nine-year follow-up
Psychosomatics, 49 (5), 426-37
PubMed 18794512

Dammen T, Ekeberg Ø, Arnesen H, Friis S (2008)
Health-related quality of life in non-cardiac chest pain patients with and without panic disorder
Int J Psychiatry Med, 38 (3), 271-86
PubMed 19069572

Haahr U, Friis S, Larsen TK, Melle I, Johannessen JO, Opjordsmoen S, Simonsen E, Rund BR, Vaglum P, McGlashan T (2008)
First-episode psychosis: diagnostic stability over one and two years
Psychopathology, 41 (5), 322-9
PubMed 18635935

Jónsdóttir H, Engh JA, Friis S, Birkenaes A, Ringen PA, Vaskinn A, Sundet K, Opjordsmoen S, Andreassen OA (2008)
Measurement of insight in patients with bipolar disorder: are self-rated scales developed for patients with schizophrenia applicable?
J Nerv Ment Dis, 196 (4), 333-5
PubMed 18414129

Melle I, Larsen TK, Haahr U, Friis S, Johannesen JO, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T (2008)
Prevention of negative symptom psychopathologies in first-episode schizophrenia: two-year effects of reducing the duration of untreated psychosis
Arch Gen Psychiatry, 65 (6), 634-40
PubMed 18519821

Nesset MB, Rossberg JI, Almvik R, Friis S (2008)
Can a focused staff training programme improve the ward atmosphere and patient satisfaction in a forensic psychiatric hospital? A pilot study
Scand J Caring Sci, 23 (1), 117-24
PubMed 19170956

Nesvold H, Friis S, Ormstad K (2008)
Sexual assault centers: attendance rates, and differences between early and late presenting cases
Acta Obstet Gynecol Scand, 87 (7), 707-15
PubMed 18607821

Rossberg JI, Karterud S, Pedersen G, Friis S (2008)
Specific personality traits evoke different countertransference reactions: an empirical study
J Nerv Ment Dis, 196 (9), 702-8
PubMed 18791432

Rossberg JI, Melle I, Opjordsmoen S, Friis S (2008)
The relationship between staff members' working conditions and patients' perceptions of the treatment environment
Int J Soc Psychiatry, 54 (5), 437-46
PubMed 18786905

Simonsen C, Sundet K, Vaskinn A, Birkenaes AB, Engh JA, Hansen CF, Jónsdóttir H, Ringen PA, Opjordsmoen S, Friis S, Andreassen OA (2008)
Neurocognitive profiles in bipolar I and bipolar II disorder: differences in pattern and magnitude of dysfunction
Bipolar Disord, 10 (2), 245-55
PubMed 18271903

Simonsen E, Haahr U, Mortensen EL, Friis S, Johannessen JO, Larsen TK, Melle I, Opjordsmoen S, Rund BR, McGlashan T, Vaglum P (2008)
Personality disorders in first-episode psychosis
Personal. Ment. Health, 2 (4), 230-239

Vaskinn A, Sundet K, Friis S, Simonsen C, Birkenaes AB, Jónsdóttir H, Ringen PA, Andreassen OA (2008)
Emotion perception and learning potential: mediators between neurocognition and social problem-solving in schizophrenia?
J Int Neuropsychol Soc, 14 (2), 279-88
PubMed 18282325

Vaskinn A, Sundet K, Friis S, Ueland T, Simonsen C, Birkenaes AB, Engh JA, Opjordsmoen S, Andreassen OA (2008)
Can learning potential in schizophrenia be assessed with the standard CVLT-II? An exploratory study
Scand J Psychol, 49 (2), 179-86
PubMed 18352988

Publications 2007

Birkenaes AB, Opjordsmoen S, Brunborg C, Engh JA, Jonsdottir H, Ringen PA, Simonsen C, Vaskinn A, Birkeland KI, Friis S, Sundet K, Andreassen OA (2007)
The level of cardiovascular risk factors in bipolar disorder equals that of schizophrenia: a comparative study
J Clin Psychiatry, 68 (6), 917-23
PubMed 17592917

Bjørngaard JH, Ruud T, Friis S (2007)
The impact of mental illness on patient satisfaction with the therapeutic relationship: a multilevel analysis
Soc Psychiatry Psychiatr Epidemiol, 42 (10), 803-9
PubMed 17622476

Bull Bringager C, Arnesen H, Friis S, Husebye T, Dammen T (2007)
A long-term follow-up study of chest pain patients: effect of panic disorder on mortality, morbidity, and quality of life
Cardiology, 110 (1), 8-14
PubMed 17934263

Engh JA, Friis S, Birkenaes AB, Jónsdóttir H, Ringen PA, Ruud T, Sundet KS, Opjordsmoen S, Andreassen OA (2007)
Measuring cognitive insight in schizophrenia and bipolar disorder: a comparative study
BMC Psychiatry, 7, 71
PubMed 18072961

Faerden A, Nesvåg R, Barrett EA, Agartz I, Finset A, Friis S, Rossberg JI, Melle I (2007)
Assessing apathy: the use of the Apathy Evaluation Scale in first episode psychosis
Eur Psychiatry, 23 (1), 33-9
PubMed 18029152

Fjell A, Bloch Thorsen GR, Friis S, Johannessen JO, Larsen TK, Lie K, Lyse HG, Melle I, Simonsen E, Smeby NA, Øxnevad AL, McFarlane WR, Vaglum P, McGlashan T (2007)
Multifamily group treatment in a program for patients with first-episode psychosis: experiences from the TIPS project
Psychiatr Serv, 58 (2), 171-3
PubMed 17287370

Joa I, Johannessen JO, Auestad B, Friis S, McGlashan T, Melle I, Opjordsmoen S, Simonsen E, Vaglum P, Larsen TK (2007)
The key to reducing duration of untreated first psychosis: information campaigns
Schizophr Bull, 34 (3), 466-72
PubMed 17905788

Joa I, Johannessen JO, Auestad B, Friis S, Opjordsmoen S, Simonsen E, Vaglum P, McGlashan T, Larsen TK (2007)
Effects on referral patterns of reducing intensive informational campaigns about first-episode psychosis
Early Interv Psychiatry, 1 (4), 340-5
PubMed 21352122

Johannessen JO, Friis S, Joa I, Haahr U, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T (2007)
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 Interv Psychiatry, 1 (1), 40-8
PubMed 21352107

Larsen TK, Melle I, Friis S, Joa I, Johannessen JO, Opjordsmoen S, Simonsen E, Vaglum P, McGlashan TH (2007)
One-year effect of changing duration of untreated psychosis in a single catchment area
Br J Psychiatry Suppl, 51, s128-32
PubMed 18055929

Rossberg JI, Karterud S, Pedersen G, Friis S (2007)
An empirical study of countertransference reactions toward patients with personality disorders
Compr Psychiatry, 48 (3), 225-30
PubMed 17445515

Rund BR, Melle I, Friis S, Johannessen JO, Larsen TK, Midbøe LJ, Opjordsmoen S, Simonsen E, Vaglum P, McGlashan T (2007)
The course of neurocognitive functioning in first-episode psychosis and its relation to premorbid adjustment, duration of untreated psychosis, and relapse
Schizophr Res, 91 (1-3), 132-40
PubMed 17258891

Publications 2006

Birkenaes AB, Søgaard AJ, Engh JA, Jonsdottir H, Ringen PA, Vaskinn A, Friis S, Sundet K, Opjordsmoen S, Andreassen OA (2006)
Sociodemographic characteristics and cardiovascular risk factors in patients with severe mental disorders compared with the general population
J Clin Psychiatry, 67 (3), 425-33
PubMed 16649830

Dammen T, Bringager CB, Arnesen H, Ekeberg O, Friis S (2006)
A 1-year follow-up study of chest-pain patients with and without panic disorder
Gen Hosp Psychiatry, 28 (6), 516-24
PubMed 17088168

Hoffart A, Hedley LM, Thornes K, Larsen SM, Friis S (2006)
Therapists' emotional reactions to patients as a mediator in cognitive behavioural treatment of panic disorder with agoraphobia
Cogn Behav Ther, 35 (3), 174-82
PubMed 16952901

Larsen TK, Melle I, Auestad B, Friis S, Haahr U, Johannessen JO, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T (2006)
Early detection of first-episode psychosis: the effect on 1-year outcome
Schizophr Bull, 32 (4), 758-64
PubMed 16809640

Larsen TK, Melle I, Auestad B, Friis S, Haahr U, Johannessen JO, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan TH (2006)
Substance abuse in first-episode non-affective psychosis
Schizophr Res, 88 (1-3), 55-62
PubMed 16971092

Melle I, Johannesen JO, Friis S, Haahr U, Joa I, Larsen TK, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan T (2006)
Early detection of the first episode of schizophrenia and suicidal behavior
Am J Psychiatry, 163 (5), 800-4
PubMed 16648319

Publications 2005

Friis S, Vaglum P, Haahr U, Johannessen JO, Larsen TK, Melle I, Opjordsmoen S, Rund BR, Simonsen E, McGlashan TH (2005)
Effect of an early detection programme on duration of untreated psychosis: part of the Scandinavian TIPS study
Br J Psychiatry Suppl, 48, s29-32
PubMed 16055804

Johannessen JO, Larsen TK, Joa I, Melle I, Friis S, Opjordsmoen S, Rund BR, Simonsen E, Vaglum P, McGlashan TH (2005)
Pathways to care for first-episode psychosis in an early detection healthcare sector: part of the Scandinavian TIPS study
Br J Psychiatry Suppl, 48, s24-8
PubMed 16055803

Publications 2004

Bringager CB, Dammen T, Friis S (2004)
Nonfearful panic disorder in chest pain patients
Psychosomatics, 45 (1), 69-79
PubMed 14709762

Dammen T, Arnesen H, Ekeberg O, Friis S (2004)
Psychological factors, pain attribution and medical morbidity in chest-pain patients with and without coronary artery disease
Gen Hosp Psychiatry, 26 (6), 463-9
PubMed 15567212

Larsen TK, Friis S, Haahr U, Johannessen JO, Melle I, Opjordsmoen S, Rund BR, Simonsen E, Vaglum PV, McGlashan TH (2004)
Premorbid adjustment in first-episode non-affective psychosis: distinct patterns of pre-onset course
Br J Psychiatry, 185, 108-15
PubMed 15286061

Melle I, Larsen TK, Haahr U, Friis S, Johannessen JO, Opjordsmoen S, Simonsen E, Rund BR, Vaglum P, McGlashan T (2004)
Reducing the duration of untreated first-episode psychosis: effects on clinical presentation
Arch Gen Psychiatry, 61 (2), 143-50
PubMed 14757590

Rossberg JI, Friis S (2004)
Patients' and staff's perceptions of the psychiatric ward environment
Psychiatr Serv, 55 (7), 798-803
PubMed 15232020

Rund BR, Melle I, Friis S, Larsen TK, Midbøe LJ, Opjordsmoen S, Simonsen E, Vaglum P, McGlashan T (2004)
Neurocognitive dysfunction in first-episode psychosis: correlates with symptoms, premorbid adjustment, and duration of untreated psychosis
Am J Psychiatry, 161 (3), 466-72
PubMed 14992972

Publications 2003

Friis S, Larsen TK, Melle I (2003)
[Therapy of psychoses]
Tidsskr Nor Laegeforen, 123 (10), 1393
PubMed 12806685

Gjelstad K, Løvdahl H, Ruud T, Friis S (2003)
[Compulsory admissions for observation in emergency psychiatric departments--discharge next day?]
Tidsskr Nor Laegeforen, 123 (7), 917-20
PubMed 12737060

Karterud S, Pedersen G, Bjordal E, Brabrand J, Friis S, Haaseth O, Haavaldsen G, Irion T, Leirvåg H, Tørum E, Urnes O (2003)
Day treatment of patients with personality disorders: experiences from a Norwegian treatment research network
J Pers Disord, 17 (3), 243-62
PubMed 12839103

Rossberg JI, Friis S (2003)
Staff members' emotional reactions to aggressive and suicidal behavior of inpatients
Psychiatr Serv, 54 (10), 1388-94
PubMed 14557526

Røssberg JI, Hoffart A, Friis S (2003)
Psychiatric staff members' emotional reactions toward patients. A psychometric evaluation of an extended version of the Feeling Word Checklist (FWC-58)
Nord J Psychiatry, 57 (1), 45-53
PubMed 12745791

Publications 2002

Chiesa M, Bateman A, Wilberg T, Friis S (2002)
Patients' characteristics, outcome and cost-benefit of hospital-based treatment for patients with personality disorder: a comparison of three different programmes
Psychol Psychother, 75 (Pt 4), 381-92
PubMed 12674121

Friis S, Larsen TK (2002)
[Does individual psychotherapy have a place in the treatment of schizophrenia?]
Tidsskr Nor Laegeforen, 122 (22), 2210-2
PubMed 12426900

Hauff E, Varvin S, Laake P, Melle I, Vaglum P, Friis S (2002)
Inpatient psychotherapy compared with usual care for patients who have schizophrenic psychoses
Psychiatr Serv, 53 (4), 471-3
PubMed 11919362