Early versus adult onset of schizophrenia: an examination of premorbid and current IQ
EOS had lower current IQ than AOS, but did not differ in premorbid IQ, suggesting a larger decline from premorbid IQ levels. This could imply different neurodevelopmental processes underlying cognitive dysfunction related to age of onset in schizophrenia, underscoring the necessity for further inquiry into the mechanisms driving this decline and strategies for its prevention.
Authors
- Dimitrios Andreou (ORCID: https://orcid.org/0000-0003-4735-3383)
- Erik G. Jönsson (ORCID: https://orcid.org/0000-0001-8368-6332)
- Tereza Calkova
- Nils Eiel Steen (ORCID: https://orcid.org/0000-0001-6442-1179)
- Kjetil Nordbø Jørgensen (ORCID: https://orcid.org/0000-0002-5751-4809)
- Ingrid Agartz (ORCID: https://orcid.org/0000-0002-9839-5391)
- Runar Elle Smelror (ORCID: https://orcid.org/0000-0001-8611-6132)
- Karin Collste (ORCID: https://orcid.org/0000-0002-1908-3323)
- Ole A. Andreassen (ORCID: https://orcid.org/0000-0002-4461-3568)
- Christine Mohn (ORCID: https://orcid.org/0000-0002-9996-4613)
- Ingrid Melle (ORCID: https://orcid.org/0000-0002-9783-548X)
- Torill Ueland (ORCID: https://orcid.org/0000-0002-8638-1152)
- Laura A. Wortinger (ORCID: https://orcid.org/0000-0003-2721-3172)
- Beathe Haatveit (ORCID: https://orcid.org/0000-0003-0264-7126)
- Simon Červenka (ORCID: https://orcid.org/0000-0001-8103-6977)
- Anne M. Myhre (ORCID: https://orcid.org/0000-0001-7702-3962)
- Anja Vaskinn (ORCID: https://orcid.org/0000-0003-0339-6170)
- Lynn Mørch-Johnsen
Institutions
- Uppsala University (SE)
- Oslo University Hospital (NO)
- University of Oslo (NO)
- Vestre Viken Hospital Trust (NO)
- Karolinska Institutet (SE)
- Västmanlands sjukhus Västerås (SE)
- Precision for Medicine (United States) (US)
- Diakonhjemmet Hospital (NO)
- Mälardalen University (SE)
- Stockholm Health Care Services (SE)
- Østfold Hospital Trust (NO)
Publication Details
- Journal
- Schizophrenia Research Cognition
- Published
- 2025-10-15
- DOI
- https://doi.org/10.1016/j.scog.2025.100397
- Primary Topic
- Schizophrenia research and treatment
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Norges Forskningsråd
- Helse Sør-Øst RHF