Publications by Petter Andreas Ringen
59 publications found
Original articles
Hypothalamic subunit volumes and relations to violence and psychopathy in male offenders with or without a psychotic disorder
Eur Arch Psychiatry Clin Neurosci (in press)
DOI 10.1007/s00406-023-01725-4, PubMed 38353675
Mental health disorders, functioning and health-related quality of life among extensively hospitalized patients due to severe self-harm - results from the Extreme Challenges project
Front Psychiatry, 14, 1258025
DOI 10.3389/fpsyt.2023.1258025, PubMed 37920539
Tobacco smoking related to childhood trauma mediated by cognitive control and impulsiveness in severe mental disorders
Schizophr Res, 261, 236-244
DOI 10.1016/j.schres.2023.09.041, PubMed 37806047
Association between cannabis use and symptom dimensions in schizophrenia spectrum disorders: an individual participant data meta-analysis on 3053 individuals
EClinicalMedicine, 64, 102199
DOI 10.1016/j.eclinm.2023.102199, PubMed 37731936
Psychopathy subdomains in violent offenders with and without a psychotic disorder
Nord J Psychiatry, 77 (4), 393-402
DOI 10.1080/08039488.2022.2128869, PubMed 36260740
Coping, Social Support and Loneliness during the COVID-19 Pandemic and Their Effect on Depression and Anxiety: Patients' Experiences in Community Mental Health Centers in Norway
Healthcare (Basel), 10 (5)
DOI 10.3390/healthcare10050875, PubMed 35628012
Vocational rehabilitation augmented with cognitive behavioral therapy or cognitive remediation for individuals with schizophrenia: a 5-year follow-up study
Nord J Psychiatry, 77 (1), 23-30
DOI 10.1080/08039488.2022.2042598, PubMed 35209785
Quality of clinical management of cardiometabolic risk factors in patients with severe mental illness in a specialist mental health care setting
Nord J Psychiatry, 76 (8), 602-609
DOI 10.1080/08039488.2022.2039288, PubMed 35200088
Childhood trauma and cardiometabolic risk in severe mental disorders: The mediating role of cognitive control
Eur Psychiatry, 64 (1), e24
DOI 10.1192/j.eurpsy.2021.14, PubMed 33775258
Improving quality of antipsychotic polypharmacy: a pilot study
Nord J Psychiatry, 74 (3), 208-212
DOI 10.1080/08039488.2019.1690044, PubMed 31724898
Predictors for Antipsychotic Dosage Change in the First Year of Treatment in Schizophrenia Spectrum and Bipolar Disorders
Front Psychiatry, 10, 649
DOI 10.3389/fpsyt.2019.00649, PubMed 31551838
Tobacco smoking and other substance use disorders associated with recurrent suicide attempts in bipolar disorder
J Affect Disord, 256, 348-357
DOI 10.1016/j.jad.2019.05.075, PubMed 31202989
A preliminary study of cortical morphology in schizophrenia patients with a history of violence
Psychiatry Res Neuroimaging, 288, 29-36
DOI 10.1016/j.pscychresns.2019.04.013, PubMed 31071542
Extreme challenges: psychiatric inpatients with severe self-harming behavior in Norway: a national screening investigation
Nord J Psychiatry, 72 (8), 605-612
DOI 10.1080/08039488.2018.1511751, PubMed 30348040
Using motivational techniques to reduce cardiometabolic risk factors in long term psychiatric inpatients: a naturalistic interventional study
BMC Psychiatry, 18 (1), 255
DOI 10.1186/s12888-018-1832-6, PubMed 30111298
Reliability and validity of the self-report version of the apathy evaluation scale in first-episode Psychosis: Concordance with the clinical version at baseline and 12 months follow-up
Psychiatry Res, 267, 140-147
DOI 10.1016/j.psychres.2018.05.065, PubMed 29906681
Cardiometabolic risk factors, physical activity and psychiatric status in patients in long-term psychiatric inpatient departments
Nord J Psychiatry, 72 (4), 296-302
DOI 10.1080/08039488.2018.1449012, PubMed 29523041
Psychiatry- where you are, where do you go?
Tidsskr. Nor. Laegeforen., 138 (3), 263-267
[Psychiatry – where do you stand, where are you going?]
Tidsskr Nor Laegeforen, 138 (3)
DOI 10.4045/tidsskr.17.0936, PubMed 29411575
Psychotic patients who used cannabis frequently before illness onset have higher genetic predisposition to schizophrenia than those who did not
Psychol Med, 48 (1), 43-49
DOI 10.1017/S0033291717001209, PubMed 28967348
Duration of untreated illness in first-treatment bipolar I disorder in relation to clinical outcome and cannabis use
Psychiatry Res, 246, 762-768
DOI 10.1016/j.psychres.2016.07.064, PubMed 27814886
Premorbid cannabis use is associated with more symptoms and poorer functioning in schizophrenia spectrum disorder
Psychol Med, 46 (15), 3127-3136
DOI 10.1017/S0033291716001999, PubMed 27534999
Cannabis use is associated with 3years earlier onset of schizophrenia spectrum disorder in a naturalistic, multi-site sample (N=1119)
Schizophr Res, 170 (1), 217-21
DOI 10.1016/j.schres.2015.11.027, PubMed 26682958
Cannabis use disorder is associated with greater illness severity in tobacco smoking patients with bipolar disorder
J Affect Disord, 190, 286-293
DOI 10.1016/j.jad.2015.10.023, PubMed 26544611
Continued cannabis use at one year follow up is associated with elevated mood and lower global functioning in bipolar I disorder
BMC Psychiatry, 15, 11
DOI 10.1186/s12888-015-0389-x, PubMed 25651990
Cannabis use in first-treatment bipolar I disorder: relations to clinical characteristics
Early Interv Psychiatry, 10 (1), 36-44
DOI 10.1111/eip.12138, PubMed 24739233
Indications of a dose-response relationship between cannabis use and age at onset in bipolar disorder
Psychiatry Res, 215 (1), 101-4
DOI 10.1016/j.psychres.2013.10.029, PubMed 24262665
One year follow-up of alcohol and illicit substance use in first-episode psychosis: does gender matter?
Compr Psychiatry, 55 (2), 274-82
DOI 10.1016/j.comppsych.2013.08.018, PubMed 24262129
Cannabis use and premorbid functioning as predictors of poorer neurocognition in schizophrenia spectrum disorder
Schizophr Res, 143 (1), 84-9
DOI 10.1016/j.schres.2012.10.021, PubMed 23178107
Predictors of medication adherence in patients with schizophrenia and bipolar disorder
Acta Psychiatr Scand, 127 (1), 23-33
DOI 10.1111/j.1600-0447.2012.01911.x, PubMed 22900964
Fighting stigma of mental illness in midsize European countries
Soc Psychiatry Psychiatr Epidemiol, 47 Suppl 1, 1-38
DOI 10.1007/s00127-012-0491-z, PubMed 22526821
Excessive cannabis use is associated with earlier age at onset in bipolar disorder
Eur Arch Psychiatry Clin Neurosci, 261 (6), 397-405
DOI 10.1007/s00406-011-0188-4, PubMed 21267743
Medication adherence in outpatients with severe mental disorders: relation between self-reports and serum level
J Clin Psychopharmacol, 30 (2), 169-75
DOI 10.1097/JCP.0b013e3181d2191e, PubMed 20520290
The use of screening instruments for detecting alcohol and other drug use disorders in first-episode psychosis
Psychiatry Res, 177 (1-2), 228-34
DOI 10.1016/j.psychres.2010.01.007, PubMed 20178887
Excessive substance use in bipolar disorder is associated with impaired functioning rather than clinical characteristics, a descriptive study
BMC Psychiatry, 10, 9
DOI 10.1186/1471-244X-10-9, PubMed 20105311
Opposite relationships between cannabis use and neurocognitive functioning in bipolar disorder and schizophrenia
Psychol Med, 40 (8), 1337-47
DOI 10.1017/S0033291709991620, PubMed 19891810
Neurocognitive dysfunction in bipolar and schizophrenia spectrum disorders depends on history of psychosis rather than diagnostic group
Schizophr Bull, 37 (1), 73-83
DOI 10.1093/schbul/sbp034, PubMed 19443616
Delusions are associated with poor cognitive insight in schizophrenia
Schizophr Bull, 36 (4), 830-5
DOI 10.1093/schbul/sbn193, PubMed 19176474
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
DOI 10.1080/08039480902879941, PubMed 19365785
The level of illicit drug use is related to symptoms and premorbid functioning in severe mental illness
Acta Psychiatr Scand, 118 (4), 297-304
DOI 10.1111/j.1600-0447.2008.01244.x, PubMed 18759810
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
DOI 10.1097/NMD.0b013e31816a62b2, PubMed 18414129
Dyslipidemia independent of body mass in antipsychotic-treated patients under real-life conditions
J Clin Psychopharmacol, 28 (2), 132-7
DOI 10.1097/JCP.0b013e318166c4f7, PubMed 18344722
Neurocognitive profiles in bipolar I and bipolar II disorder: differences in pattern and magnitude of dysfunction
Bipolar Disord, 10 (2), 245-55
DOI 10.1111/j.1399-5618.2007.00492.x, PubMed 18271903
Emotion perception and learning potential: mediators between neurocognition and social problem-solving in schizophrenia?
J Int Neuropsychol Soc, 14 (2), 279-88
DOI 10.1017/S1355617708080314, PubMed 18282325
Illicit drug use in patients with psychotic disorders compared with that in the general population: a cross-sectional study
Acta Psychiatr Scand, 117 (2), 133-8
DOI 10.1111/j.1600-0447.2007.01135.x, PubMed 18081921
Measuring cognitive insight in schizophrenia and bipolar disorder: a comparative study
BMC Psychiatry, 7, 71
DOI 10.1186/1471-244X-7-71, PubMed 18072961
Differences in prevalence and patterns of substance use in schizophrenia and bipolar disorder
Psychol Med, 38 (9), 1241-9
DOI 10.1017/S003329170700236X, PubMed 18070373
The effect of gender on emotion perception in schizophrenia and bipolar disorder
Acta Psychiatr Scand, 116 (4), 263-70
DOI 10.1111/j.1600-0447.2007.00991.x, PubMed 17803756
The level of cardiovascular risk factors in bipolar disorder equals that of schizophrenia: a comparative study
J Clin Psychiatry, 68 (6), 917-23
DOI 10.4088/jcp.v68n0614, PubMed 17592917
[Medicine and psychiatry--in part and divided?]
Tidsskr Nor Laegeforen, 127 (7), 908-10
PubMed 17435816
Sociodemographic characteristics and cardiovascular risk factors in patients with severe mental disorders compared with the general population
J Clin Psychiatry, 67 (3), 425-33
DOI 10.4088/jcp.v67n0314, PubMed 16649830
[Models and trends in psychiatry--should neurobiology form a common basis?]
Tidsskr Nor Laegeforen, 122 (20), 2024-7
PubMed 12555451
Review articles
Severe Mental Illness and Cardiovascular Disease: JACC State-of-the-Art Review
J Am Coll Cardiol, 80 (9), 918-933
DOI 10.1016/j.jacc.2022.06.017, PubMed 36007991
Increased mortality in schizophrenia due to cardiovascular disease - a non-systematic review of epidemiology, possible causes, and interventions
Front Psychiatry, 5, 137
DOI 10.3389/fpsyt.2014.00137, PubMed 25309466
Other articles
PSYCHIATRIC CASES
Tidsskr. Nor. Laegeforen., 140 (17), 1798
A Call for Cardiopsychiatry
Cardiology, 145 (7), 410-412
DOI 10.1159/000507328, PubMed 32353849
Psychoses and illicit drug use: need for cross-cultural studies - Reply
Acta Psychiatr. Scand., 118 (1), 86-87
DOI 10.1111/j.1600-0447.2008.01210.x
Book chapters
Modeller og trender i psykiatri: bør nevrologi danne en felles basis?
In Tidsskrift for Den norske legeforening, Foreningen, Oslo, 122(2002)nr. 20, S. 2024-2027
BIBSYS 031282172
Theses
Substance use in psychotic disorder: use patterns and relation to clinical and cognitive characteristics in schizophrenia and bipolar disorder
In Series of dissertations submitted to the Faculty of Medicine, University of Oslo, Unipub, Oslo, no. 805, 1 b. (flere pag.)
BIBSYS 093181116, ISBN 978-82-8072-946-0