prof. dr. I.E.C. (Iris) Sommer

psychiatrist

Faculty of Medical Sciences

Telephone:

E-mail:

i.e.c.sommer umcg.nl

Homepage Research Portal

Publications

Mental health, coping and related risk factors during the first 2 years of the COVID-19 pandemic in children: Nationally representative, multi-wave, cross-sectional results from 12 countries from the global COH-FIT study

Agorastos, A., Thompson, T., Solmi, M., Cortese, S., Estradé, A., Radua, J., Dragioti, E., Vancampfort, D., Thygesen, L. C., Aschauer, H., Schlögelhofer, M., Aschauer, E., Schneeberger, A., Huber, C. G., Hasler, G., Conus, P., Do Cuénod, K. Q., von Känel, R., Arrondo, G. & Fusar-Poli, P., Gorwood, P., Llorca, P. M., Krebs, M. O., Scanferla, E., Kishimoto, T., Rabbani, G., Skonieczna-Żydecka, K., Brambilla, P., Favaro, A., Takamiya, A., Zoccante, L., Colizzi, M., Bourgin, J., Kamiński, K., Moghadasin, M., Seedat, S., Matthews, E., Wells, J., Vassilopoulou, E., Gadelha, A., Su, K. P., Kwon, J. S., Kim, M., Lee, T., Papsuev, O., Manková, D., Boscutti, A., Gerunda, C., Maes, M., Sommer, I., Weiser, M. & Correll, C. U., Mar-2026, In: European Neuropsychopharmacology. 104, 13 p., 112741.

Research output: Contribution to journal › Article › Academic › peer-review

Negative association between cognitive functioning and antipsychotic D2 receptor occupancy, affinity, and dose after first episode psychosis

Oomen, P. P., Gangadin, S. S., de Haan, L., de Beer, F., Beune, O. E., Oostendorp, D. A. D., Begemann, M. J. H., Boonstra, N., Kikkert, M., Koops, S., Veling, W. & Sommer, I. E. C., 2-Jan-2026, (E-pub ahead of print) In: Psychological Medicine. 56, 10 p.

Research output: Contribution to journal › Article › Academic › peer-review

Absolute neutrophil count and adverse drug reaction monitoring during clozapine treatment: consensus guidelines from a global Delphi panel

Clozapine Delphi Expert Panel, Siskind, D., Northwood, K., Pillinger, T., Chan, S., Correll, C. U., Cotes, R., Every-Palmer, S., Hahn, M., Howes, O., Kane, J. M., Kelly, D., Korman, N., Lappin, J., Mena, C., Myles, N. & McCutcheon, R. A., 2-Jul-2025, (E-pub ahead of print) In: The Lancet Psychiatry.

Research output: Contribution to journal › Review article › peer-review

Apomorphine susceptibility and prenatal infection alter neurodevelopment, synaptic density and anticipatory behavior in rats

Witt, K., Kidwell, M., Doorduin, J., de Vries, E. F. J., Sommer, I. E., Day, D. J., Ellenbroek, B. A. & Guerrin, C. G. J., 2-Oct-2025, In: Progress in Neuro-Psychopharmacology & Biological Psychiatry. 142, 14 p., 111490.

Research output: Contribution to journal › Article › Academic › peer-review

A single composite index of semantic behavior tracks symptoms of psychosis over time

Palominos, C., Kirdun, M., Nikzad, A. H., Spilka, M. J., Homan, P., Sommer, I. E., Tang, S. X. & Hinzen, W., May-2025, In: Schizophrenia Research. 279, p. 116-127 12 p.

Research output: Contribution to journal › Article › Academic › peer-review

Association between the exposome score for schizophrenia and functioning in remitted first-episode psychosis: results from the HAMLETT study

HAMLETT OPHELIA Consortium, Kamphuis, S., Arias-Magnasco, A., Gangadin, S., Begemann, M., Wijnen, B., Veling, W., de Haan, L., Sommer, I., van Os, J., Bakker, P. R. & Gülöksüz, S., Nov-2025, In: Schizophrenia Research. 285, p. 223-231 9 p.

Research output: Contribution to journal › Article › Academic › peer-review

Biomarkers of intestinal permeability in major psychiatric disorders: Distinct biological roles call for a more nuanced application

Ioannou, M., Borkent, J., Severance, E. G., Yolken, R. H., Fasano, A., Sommer, I. E. C. & Haarman, B. C. M., 20-Jun-2025, In: Progress in Neuro-Psychopharmacology and Biological Psychiatry. 139, 14 p., 111405.

Research output: Contribution to journal › Review article › peer-review

Brainstorm: The Human Brain & Research in Groningen

Sommer, I. E. C., van Tol, M.-J. & de Beer, F., Feb-2025

Research output: Non-textual form › Exhibition › Popular

Cholinergic Denervation Patterns in Parkinson's Disease Associated With Cognitive Impairment Across Domains

d'Angremont, E., Renken, R., van der Zee, S., de Vries, E. F. J., van Laar, T. & Sommer, I. E. C., 2025, In: Human brain mapping. 46, 2, 11 p., e70047.

Research output: Contribution to journal › Article › Academic › peer-review

Collaborative outcomes study on health and functioning during infection times (COH-FIT): Insights on modifiable and non-modifiable risk and protective factors for wellbeing and mental health during the COVID-19 pandemic from multivariable and network analyses

Solmi, M., Thompson, T., Cortese, S., Estradé, A., Agorastos, A., Radua, J., Dragioti, E., Vancampfort, D., Thygesen, L. C., Aschauer, H., Schlögelhofer, M., Aschauer, E., Schneeberger, A., Huber, C. G., Hasler, G., Conus, P., Cuénod, K. Q. D., von Känel, R., Arrondo, G. & Fusar-Poli, P., Gorwood, P., Llorca, P. M., Krebs, M. O., Scanferla, E., Kishimoto, T., Rabbani, G., Skonieczna-Żydecka, K., Brambilla, P., Favaro, A., Takamiya, A., Zoccante, L., Colizzi, M., Bourgin, J., Kamiński, K., Moghadasin, M., Seedat, S., Matthews, E., Wells, J., Vassilopoulou, E., Gadelha, A., Su, K. P., Kwon, J. S., Kim, M., Lee, T. Y., Papsuev, O., Manková, D., Boscutti, A., Gerunda, C., Maes, M. & Sommer, I., Jan-2025, In: European Neuropsychopharmacology. 90, p. 1-15 15 p.

Research output: Contribution to journal › Article › Academic › peer-review