Blar i Department of Clinical Medicine på forfatter "Bartz-Johannessen, Christoffer"
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Differential Effectiveness of Atypical Antipsychotics on Hallucinations: A Pragmatic Randomized Controlled Trial
Sinkeviciute, Igne; Hugdahl, Kenneth Jan; Bartz-Johannessen, Christoffer; Kroken, Rune Andreas; Løberg, Else-Marie; Kjelby, Eirik; Rettenbacher, maria; Joa, Inge; Reitan, Solveig Merete Klæbo; Alisauskiene, Renata; Fathian, Farivar; Johnsen, Erik (Journal article; Peer reviewed, 2021-07)Background Most studies investigating antipsychotic effectiveness report either total psychopathology or symptom cluster findings. Studies focusing on a separate symptom, such as hallucinations, a hallmark symptom in ... -
Electroconvulsive therapy triggers a reversible decrease in brain N-acetylaspartate
Erchinger, Vera Jane; Craven, Alexander R.; Ersland, Lars; Oedegaard, Ketil J.; Bartz-Johannessen, Christoffer; Hammar, Åsa Karin; Haavik, Jan; Riemer, Frank; Kessler, Ute; Oltedal, Leif (Journal article; Peer reviewed, 2023)Introduction: Based on previous research on electroconvulsive therapy (ECT) we have proposed a model where disruption, potentiation, and rewiring of brain networks occur in sequence and serve as the underlying therapeutic ... -
Homogeneity in prediction of survival probabilities for subcategories of hipprosthesis data: The Nordic Arthroplasty Register Association, 2000-2013
Bartz-Johannessen, Christoffer; Furnes, Ove; Fenstad, Anne Marie; Lie, Stein Atle; Pedersen, Alma Becic; Overgaard, Søren; Kärrholm, Johan; Malchau, Henrik; Mäkelä, Keijo; Eskelinen, Antti; Wilkinson, Jeremy M (Peer reviewed; Journal article, 2019-07-10)Introduction: The four countries in the Nordic Arthroplasty Register Association (NARA) share geographic proximity, culture, and ethnicity. Pooling data from different sources in order to obtain higher precision and accuracy ... -
Hospital volume and the risk of revision in Oxford unicompartmental knee arthroplasty in the Nordic countries -an observational study of 14,496 cases
Badawy, Mona; Fenstad, Anne Marie; Bartz-Johannessen, Christoffer; Indrekvam, Kari; Havelin, Leif Ivar; Robertsson, Otto; W-Dahl, Annette; Eskelinen, Antti; Mäkelä, Keijo; Pedersen, Alma B.; Schrøder, Henrik M.; Furnes, Ove (Peer reviewed; Journal article, 2017-09-07)Background High procedure volume and dedication to unicompartmental knee arthroplasty (UKA) has been suggested to improve revision rates. This study aimed to quantify the annual hospital volume effect on revision risk in ... -
Operating room ventilation-Validation of reported data on 108 067 primary total hip arthroplasties in the Norwegian Arthroplasty Register
Langvatn, Håkon; Bartz-Johannessen, Christoffer; Schrama, Johannes Cornelis; Hallan, Geir; Furnes, Ove; Lingaas, Egil; Walenkamp, Geert; Engesæter, Lars B.; Dale, Håvard (Peer reviewed; Journal article, 2020)Rationale, aims, and objectives: The true effect of laminar airflow (LAF) systems on postoperative infection is disputed, partly due to uncertainty regarding the validity of ventilation data in register studies. The aim ... -
Overactive, aggressive, disruptive and agitated behavior associated with the use of psychotropic medications in schizophrenia
Strømme, Maria Fagerbakke; Bartz-Johannessen, Christoffer; Kroken, Rune Andreas; Mehlum, Lars; Johnsen, Erik (Journal article; Peer reviewed, 2022)Background: Evidence is limited for the associations between use of psychotropic medications and overactive, aggressive, disruptive or agitated behavior (OADA)1 in clinical practice. Aims: To investigate the associations ... -
Personalized estimation of one-year mortality risk after elective hip or knee arthroplasty for osteoarthritis.
Trela-Larsen, L; Kroken, Gard; Bartz-Johannessen, Christoffer; Sayers, Adele; Aram, P; McCloskey, Eugene; Kadirkamanathan, V; Blom, A; Lie, Stein Atle; Furnes, Ove; Wilkinson, J. Mark (Journal article; Peer reviewed, 2020)Aims To develop and validate patient-centred algorithms that estimate individual risk of death over the first year after elective joint arthroplasty surgery for osteoarthritis. Methods A total of 763,213 hip and knee ... -
Trajectories of response in schizophrenia-spectrum disorders: A one-year prospective cohort study of antipsychotic effectiveness
Drosos, Petros; Johnsen, Erik; Bartz-Johannessen, Christoffer; Larsen, Tor Ketil; Reitan, Solveig Klæbo; Rettenbacher, Maria; Kroken, Rune Andreas (Journal article; Peer reviewed, 2022)Background: Antipsychotic drugs remain the mainstay of schizophrenia treatment; however, their effectiveness has been questioned, and it is not possible to predict the response to a specific antipsychotic drug in an ... -
Use of Benzodiazepines and Antipsychotic Drugs Are Inversely Associated with Acute Readmission Risk in Schizophrenia
Strømme, Maria Fagerbakke; Mellesdal, Liv Solrunn; Bartz-Johannessen, Christoffer; Kroken, Rune Andreas; Krogenes, Marianne Leiknes; Mehlum, Lars; Johnsen, Erik (Journal article; Peer reviewed, 2022)Purpose: Little is known about the impact of different psychotropic drugs on acute readmission risk, when used concomitantly in a real-life setting. We aimed to investigate the association between acute readmission risk ...