Research output per year
Research output per year
- 49 results
Search results
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2024
Addressing the Evidence to Practice Gap: What to Expect from International Antipsychotic Dose Reduction Studies in the Tapering Anti-Psychotics and Evaluating Recovery Consortium
TAPER international research consortium, Koops, S., Allott, K., De Haan, L., Chen, E., Hui, C., Killackey, E., Long, M., Moncrieff, J., Sommer, I., Stürup, A. E., Wunderink, L. & Begemann, M., Jan-2024, In: Schizophrenia Bulletin. 50, 1, p. 5-8 4 p.Research output: Contribution to journal › Editorial › Academic › peer-review
Open AccessFile7 Citations (Scopus)106 Downloads (Pure) -
Antipsychotica na een eerste psychose
Translated title of the contribution :Antipsychotic medication after a first episode of psychosis: taper or continue? Research output: Contribution to journal › Article › Academic › peer-review
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Antipsychotic dopamine D2 affinity and negative symptoms in remitted first episode psychosis patients
HAMLETT OPHELIA Consortium, de Beer, F., Wijnen, B., Wouda, L., Koops, S., Gangadin, S., Veling, W., van Beveren, N., de Haan, L., Begemann, M. J. H., Sommer, I. E. C. & Djordjevic, M., Dec-2024, In: Schizophrenia Research. 274, p. 299-306 8 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile1 Downloads (Pure) -
Lower fractional anisotropy without evidence for neuro-inflammation in patients with early-phase schizophrenia spectrum disorders
Gangadin, S. S., Mandl, R. C. W., de Witte, L. D., van Haren, N. E. M., Schutte, M. J. L., Begemann, M. J. H., Kahn, R. S. & Sommer, I. E. C., Feb-2024, In: Schizophrenia Research. 264, p. 557-566 10 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile2 Citations (Scopus)46 Downloads (Pure) -
Personal recovery in first-episode psychosis: Beyond clinical and functional recovery
HAMLETT and OPHELIA Consortium, Maas, I. L., Bohlken, M. M., Gangadin, S. S., Rosema, B. S., Veling, W., Boonstra, N., de Haan, L., Begemann, M. J. H. & Koops, S., Apr-2024, In: Schizophrenia Research. 266, p. 32-40 9 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile1 Citation (Scopus)92 Downloads (Pure) -
Psychiatrists effect on positive symptom severity and daily functioning during pharmacotherapy for first-episode psychosis patients
HAMLETT OPHELIA Consortium, de Beer, F., Koops, S., Schoevers, R. A., Veling, W., van Beveren, N., de Haan, L. & Boonstra, N., 2-Oct-2024, In: Scientific Reports. 14, 1, 11 p., 22871.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile9 Downloads (Pure) -
Response to psychotic experiences: Impact of personality traits on perceived levels of distress
GROUP, Scholte-Stalenhoef, A. N., Boyette, L. L., Begemann, M., Schirmbeck, F., Hasson-Ohayon, I., Cahn, W., de Haan, L. & Pijnenborg, G. H. M., May-2024, In: Schizophrenia Research. 267, p. 282-290 9 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile32 Downloads (Pure) -
The association of prolactin and gonadal hormones with cognition and symptoms in men with schizophrenia spectrum disorder: Divergent effects of testosterone and estrogen
Hamers, I. M. H., Brand, B. A., Begemann, M. J. H., Weickert, C. S., Weickert, T. W. & Sommer, I. E. C., Aug-2024, In: Schizophrenia Research. 270, p. 273-280 8 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile24 Downloads (Pure) -
2023
Childhood trauma is associated with reduced frontal gray matter volume: A large transdiagnostic structural MRI study
Begemann, M. J. H., Schutte, M. J. L., Van Dellen, E., Abramovic, L., Boks, M. P., Van Haren, N. E. M., Mandl, R. C. W., Vinkers, C. H., Bohlken, M. M. & Sommer, I. E. C., Feb-2023, In: Psychological Medicine. 53, 3, p. 741-749 9 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile22 Citations (Scopus)74 Downloads (Pure) -
Cholinesterase Inhibitors for Treatment of Psychotic Symptoms in Alzheimer Disease and Parkinson Disease: A Meta-analysis
D'Angremont, E., Begemann, M. J. H., Van Laar, T. & Sommer, I. E. C., Aug-2023, In: Jama neurology. 80, 8, p. 813-823 11 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile19 Citations (Scopus)208 Downloads (Pure) -
Longitudinal clinical and functional outcome in distinct cognitive subgroups of first-episode psychosis: a cluster analysis
Oomen, P. P., Begemann, M. J. H., Brand, B. A., de Haan, L., Veling, W., Koops, S., van Os, J., Smit, F., Bakker, P. R., van Beveren, N., Boonstra, N., Gülöksüz, S., Kikkert, M., Lokkerbol, J., Marcelis, M., Rosema, B.-S., de Beer, F., Gangadin, S. S., Geraets, C. N. W. & van 't Hag, E. & 24 others, , Apr-2023, In: Psychological Medicine. 53, 6, p. 2317 - 2327 11 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile19 Citations (Scopus)63 Downloads (Pure) -
Social Deafferentation and the Relation Between Loneliness and Hallucinations
Brederoo, S. G., de Boer, J. N., Linszen, M. M. J., Blom, R. E., Begemann, M. J. H. & Sommer, I. E. C., Mar-2023, In: Schizophrenia Bulletin. 49, 1, p. S25-S32 8 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile4 Citations (Scopus)79 Downloads (Pure) -
The association of childhood trauma with depressive and negative symptoms in recent onset psychosis: a sex-specific analysis
HAMLETT and OPHELIA Consortium, Enthoven, A.-S. D., Gangadin, S. S., de Haan, L., Veling, W., de Vries, E. F. J., Doorduin, J., Begemann, M. J. H. & Sommer, I. E. C., Dec-2023, In: Psychological Medicine. 53, p. 7795–7804 10 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile54 Downloads (Pure) -
2022
Antipsychotic maintenance treatment versus dose reduction: how the story continues
Sommer, I. E. C., Horowitz, M., Allott, K., Speyer, H. & Begemann, M. J. H., Aug-2022, In: The Lancet Psychiatry. 9, 8, p. 602-603 2 p.Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review
Open AccessFile6 Citations (Scopus)185 Downloads (Pure) -
Auditory verbal hallucinations and childhood trauma subtypes across the psychosis continuum: a cluster analysis
Begemann, M. J. H., Sommer, I. E., Brand, R. M., Oomen, P. P., Jongeneel, A., Berkhout, J., Molenaar, R. E., Wielage, N. N., Toh, W. L., Rossell, S. L. & Bell, I. H., 2022, In: Cognitive Neuropsychiatry. 27, 2-3, 19 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile9 Citations (Scopus)92 Downloads (Pure) -
Editorial: new directions in hallucination research
Urwyler, P., Begemann, M. & Bell, V., 2022, In: Cognitive Neuropsychiatry. 27, 2-3, p. 83-85 3 p.Research output: Contribution to journal › Editorial › Academic › peer-review
Open AccessFile72 Downloads (Pure) -
Medication strategies in first episode psychosis patients: A survey among psychiatrists
HAMLETT OPHELIA Consortium, Kikkert, M. J., Veling, W., de Haan, L., Begemann, M. J. H., de Koning, M. & Sommer, I. E., Feb-2022, In: Early intervention in psychiatry. 16, 2, p. 139-146 8 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile9 Citations (Scopus)163 Downloads (Pure) -
Occurrence and phenomenology of hallucinations in the general population: A large online survey
Linszen, M. M. J., de Boer, J. N., Schutte, M. J. L., Begemann, M. J. H., de Vries, J., Koops, S., Blom, R. E., Bohlken, M. M., Heringa, S. M., Blom, J. D. & Sommer, I. E. C., Dec-2022, In: Schizophrenia. 8, 11 p., 41.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile30 Citations (Scopus)128 Downloads (Pure) -
The neurobiological characterization of distinct cognitive subtypes in early-phase schizophrenia-spectrum disorders
Oomen, P. P., Gangadin, S. S., Begemann, M. J. H., Visser, E., Mandl, R. C. W. & Sommer, I. E. C., Mar-2022, In: Schizophrenia Research. 241, p. 228-237 10 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile8 Citations (Scopus)90 Downloads (Pure) -
2021
Physical exercise improves quality of life, depressive symptoms, and cognition across chronic brain disorders: a transdiagnostic systematic review and meta-analysis of randomized controlled trials
Dauwan, M., Begemann, M. J. H., Slot, M. I. E., Lee, E. H. M., Scheltens, P. & Sommer, I. E. C., Apr-2021, In: Journal of Neurology. 268, 4, p. 1222-1246 25 p.Research output: Contribution to journal › Review article › peer-review
Open AccessFile135 Citations (Scopus)262 Downloads (Pure) -
Simvastatin Augmentation for Patients With Early-Phase Schizophrenia-Spectrum Disorders: A Double-Blind, Randomized Placebo-Controlled Trial
Sommer, I. E., Gangadin, S. S., de Witte, L. D., Koops, S., van Baal, C., Bahn, S., Drexhage, H., van Haren, N. E. M., Veling, W., Bruggeman, R., Martens, P., Wiersma, S., Veerman, S. R. T., Grootens, K. P., van Beveren, N., Kahn, R. S. & Begemann, M. J. H., Jul-2021, In: Schizophrenia Bulletin. 47, 4, p. 1108–1115 8 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile27 Citations (Scopus)124 Downloads (Pure) -
2020
Discontinuation of antipsychotic medication-time to rethink trial design
Speyer, H., Begemann, M., Albert, N., Weller, A., Nordentoft, M., Veling, W., Sommer, I. E., Allott, K. & Killackey, E., Oct-2020, In: The Lancet. Psychiatry. 7, 10, p. 841-842 2 p.Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review
Open AccessFile9 Citations (Scopus)48 Downloads (Pure) -
Drugs with anti-inflammatory effects to improve outcome of traumatic brain injury: a meta-analysis
Begemann, M., Leon, M., van der Horn, H. J., van der Naalt, J. & Sommer, I., 30-Sept-2020, In: Scientific Reports. 10, 1, p. 1-10 10 p., 16179.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile27 Citations (Scopus)137 Downloads (Pure) -
Efficacy of non-invasive brain stimulation on cognitive functioning in brain disorders: a meta-analysis
Begemann, M. J., Brand, B. A., Ćurčić-Blake, B., Aleman, A. & Sommer, I. E., Nov-2020, In: Psychological Medicine. 50, 15, p. 2465-2486 22 p., 0033291720003670.Research output: Contribution to journal › Review article › peer-review
Open AccessFile178 Citations (Scopus)181 Downloads (Pure) -
Hallucinations after Cardiac Surgery: A Prospective Observational Study
Ottens, T. H., Sommer, I. E. C., Begemann, M. J., Schutte, M., Cramer, M. J., Suyker, W. J., Van Dijk, D. & Slooter, A. J. C., 2-Mar-2020, In: Medicina-Lithuania. 56, 3, 9 p., 104.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile6 Citations (Scopus)118 Downloads (Pure) -
Hallucinations in Older Adults: A Practical Review
Badcock, J. C., Laroi, F., Kamp, K., Kelsall-Foreman, I., Bucks, R. S., Weinborn, M., Begemann, M., Taylor, J.-P., Collerton, D., O'Brien, J. T., El Haj, M., Ffytche, D. & Sommer, I. E., Nov-2020, In: Schizophrenia Bulletin. 46, 6, p. 1382-1395 14 p.Research output: Contribution to journal › Review article › peer-review
Open AccessFile15 Citations (Scopus)107 Downloads (Pure) -
Language in schizophrenia: relation with diagnosis, symptomatology and white matter tracts
de Boer, J. N., van Hoogdalem, M., Mandl, R. C. W., Brummelman, J., Voppel, A. E., Begemann, M. J. H., van Dellen, E., Wijnen, F. N. K. & Sommer, I. E. C., 20-Apr-2020, In: NPJ Schizophrenia. 6, 1, 10 p., 10.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile58 Citations (Scopus)151 Downloads (Pure) -
To continue or not to continue? Antipsychotic medication maintenance versus dose-reduction/discontinuation in first episode psychosis: HAMLETT, a pragmatic multicenter single-blind randomized controlled trial
Begemann, M. J. H., Thompson, I. A., Veling, W., Gangadin, S. S., Geraets, C. N. W., van 't Hag, E., Mueller-Kuperus, S. J., Oomen, P. P., Voppel, A. E., van der Gaag, M., Kikkert, M. J., Van Os, J., Smit, H. F. E., Knegtering, R. H., Wiersma, S., Stouten, L. H., Gijsman, H. J., Wunderink, L., Staring, A. B. P. & Veerman, S. R. T. & 17 others, , 7-Feb-2020, In: Trials. 21, 1, p. 147 19 p., 147.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile49 Citations (Scopus)344 Downloads (Pure) -
2019
Atopy Increases Risk of Psychotic Experiences: A Large Population-Based Study
Begemann, M. J. H., Linszen, M. M. J., de Boer, J. N., Hovenga, W. D., Gangadin, S. S., Schutte, M. J. L. & Sommer, I. E. C., 9-Jul-2019, In: Frontiers in Psychiatry. 10, 7 p., 453.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile10 Citations (Scopus)186 Downloads (Pure) -
Auditory hallucinations, top-down processing and language perception: a general population study
de Boer, J. N., Linszen, M. M. J., de Vries, J., Schutte, M. J. L., Begemann, M. J. H., Heringa, S. M., Bohlken, M. M., Hugdahl, K., Aleman, A., Wijnen, F. N. K. & Sommer, I. E. C., Dec-2019, In: Psychological Medicine. 49, 16, p. 2772-2780 9 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile32 Citations (Scopus)152 Downloads (Pure) -
2018
Auditory hallucinations across the lifespan: a systematic review and meta-analysis
Maijer, K., Begemann, M. J. H., Palmen, S. J. M. C., Leucht, S. & Sommer, I. E. C., Apr-2018, In: Psychological Medicine. 48, 6, p. 879-888 10 p.Research output: Contribution to journal › Review article › peer-review
122 Citations (Scopus) -
Childhood abuse and white matter integrity in bipolar disorder patients and healthy controls
Stevelink, R., Abramovic, L., Verkooijen, S., Begemann, M. J. H., Sommer, I. E. C., Boks, M. P., Mandl, R. C. W., van Haren, N. E. M. & Vinkers, C. H., Jul-2018, In: European Neuropsychopharmacology. 28, 7, p. 807-817 11 p.Research output: Contribution to journal › Article › Academic › peer-review
18 Citations (Scopus) -
Clinical use of semantic space models in psychiatry and neurology: A systematic review and meta-analysis
de Boer, J. N., Voppel, A. E., Begemann, M. J. H., Schnack, H. G., Wijnen, F. & Sommer, I. E. C., Oct-2018, In: Neuroscience and Biobehavioral Reviews. 93, p. 85-92 8 p.Research output: Contribution to journal › Review article › peer-review
36 Citations (Scopus) -
Efficacy of different types of cognitive enhancers for patients with schizophrenia: a meta-analysis
Sinkeviciute, I., Begemann, M., Prikken, M., Oranje, B., Johnsen, E., Lei, W. U., Hugdahl, K., Kroken, R. A., Rau, C., Jacobs, J. D., Mattaroccia, S. & Sommer, I. E., 25-Oct-2018, In: NPJ Schizophrenia. 4, 14 p., 22.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile57 Citations (Scopus)356 Downloads (Pure) -
Immediate and long-term effects of bilateral electroconvulsive therapy on cognitive functioning in patients with a depressive disorder
Nuninga, J. O., Claessens, T. F. I., Somers, M., Mandl, R., Nieuwdorp, W., Boks, M. P., Bakker, S., Begemann, M. J. H., Heringa, S. & Sommer, I. E. C., 1-Oct-2018, In: Journal of Affective Disorders. 238, p. 659-665 7 p.Research output: Contribution to journal › Article › Academic › peer-review
42 Citations (Scopus) -
The effect of raloxifene augmentation in men and women with a schizophrenia spectrum disorder: a systematic review and meta-analysis
de Boer, J., Prikken, M., Lei, W. U., Begemann, M. & Sommer, I., 10-Jan-2018, In: NPJ Schizophrenia. 4, 6 p., 1.Research output: Contribution to journal › Review article › peer-review
Open AccessFile60 Citations (Scopus)270 Downloads (Pure) -
2017
Letter to the Editor: Beyond childhood trauma - stressful events early and later in life in relation to psychotic experiences
Begemann, M. J. H., Stotijn, E., Schutte, M. J. L., Heringa, S. M. & Sommer, I. E. C., Nov-2017, In: Psychological Medicine. 47, 15, p. 2731-2736 6 p.Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review
3 Citations (Scopus) -
2016
Childhood Trauma as a Neglected Factor in Psychotic Experiences and Cognitive Functioning
Begemann, M. J. H., Heringa, S. M. & Sommer, I. E. C., Aug-2016, In: Jama psychiatry. 73, 8, p. 875-876 3 p.Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review
3 Citations (Scopus) -
Exercise Improves Clinical Symptoms, Quality of Life, Global Functioning, and Depression in Schizophrenia: A Systematic Review and Meta-analysis
Dauwan, M., Begemann, M. J. H., Heringa, S. M. & Sommer, I. E., 2016, In: Schizophrenia Bulletin. 42, 3, p. 588-99 12 p.Research output: Contribution to journal › Review article › peer-review
Open AccessFile282 Citations (Scopus)90 Downloads (Pure) -
Letter to the Editor: Childhood trauma as a risk factor for psychosis: the confounding role of cognitive functioning
Begemann, M. J. H., Daalman, K., Heringa, S. M., Schutte, M. J. L. & Sommer, I. E. C., Apr-2016, In: Psychological Medicine. 46, 5, p. 1115-1118 4 p.Research output: Contribution to journal › Letter › Academic › peer-review
8 Citations (Scopus) -
Relationship between neuroticism, childhood trauma and cognitive-affective responses to auditory verbal hallucinations
So, S.H.-W., Begemann, M. J. H., Gong, X. & Sommer, I. E., 4-Oct-2016, In: Scientific Reports. 6, 8 p., 34401.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile5 Citations (Scopus)13 Downloads (Pure) -
2015
Childhood Trauma-Specific Reductions in Limbic Gray Matter Volume: Still in the Dark
Begemann, M. J. H., Schutte, M. J. L. & Sommer, I. E. C., Apr-2015, In: Jama psychiatry. 72, 4, p. 398-399 2 p.Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review
1 Citation (Scopus) -
Sex hormones and oxytocin augmentation strategies in schizophrenia: A quantitative review
Heringa, S. M., Begemann, M. J. H., Goverde, A. J. & Sommer, I. E. C., Nov-2015, In: Schizophrenia Research. 168, 3, p. 603-613 11 p.Research output: Contribution to journal › Article › Academic › peer-review
74 Citations (Scopus) -
Simvastatin augmentation for recent-onset psychotic disorder: A study protocol
Begemann, M. J. H., Schutte, M. J. L., Slot, M. I. E., Doorduin, J., Bakker, P. R., van Haren, N. E. M. & Sommer, I. E. C., Dec-2015, In: Clinical Journal of the American Society of Nephrology. 4, p. 52-58 7 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile19 Citations (Scopus)348 Downloads (Pure) -
2014
Efficacy of Anti-inflammatory Agents to Improve Symptoms in Patients With Schizophrenia: An Update
Sommer, I. E., van Westrhenen, R., Begemann, M. J. H., de Witte, L. D., Leucht, S. & Kahn, R. S., Jan-2014, In: Schizophrenia Bulletin. 40, 1, p. 181-191 11 p.Research output: Contribution to journal › Article › Academic › peer-review
282 Citations (Scopus) -
2013
The influence of stimulus detection on activation patterns during auditory hallucinations
van Lutterveld, R., Diederen, K. M. J., Koops, S., Begemann, M. J. H. & Sommer, I. E. C., Apr-2013, In: Schizophrenia Research. 145, 1-3, p. 27-32 6 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile32 Citations (Scopus)21 Downloads (Pure) -
2012
Estrogen augmentation in schizophrenia: A quantitative review of current evidence
Begemann, M. J. H., Dekker, C. F., van Lunenburg, M. & Sommer, I. E., Nov-2012, In: Schizophrenia Research. 141, 2-3, p. 179-184 6 p.Research output: Contribution to journal › Review article › peer-review
77 Citations (Scopus) -
Nonsteroidal Anti-Inflammatory Drugs in Schizophrenia: Ready for Practice or a Good Start? A Meta-Analysis
Sommer, I. E., de Witte, L., Begemann, M. & Kahn, R. S., Apr-2012, In: Journal of Clinical Psychiatry. 73, 4, p. 414-419 6 p.Research output: Contribution to journal › Review article › peer-review
158 Citations (Scopus) -
Pharmacological Augmentation Strategies for Schizophrenia Patients With Insufficient Response to Clozapine: A Quantitative Literature Review
Sommer, I. E., Begemann, M. J. H., Temmerman, A. & Leucht, S., Sept-2012, In: Schizophrenia Bulletin. 38, 5, p. 1003-1011 9 p.Research output: Contribution to journal › Review article › peer-review
128 Citations (Scopus)