Cited by 81Schizophrenia research and treatmentDementia and Cognitive Impairment ResearchMental Health and Psychiatry

Neurocognition in schizophrenia: a 20-year multi-follow-up of the course of processing speed and stored knowledge

Open access
Bonner-Jackson, Aaron, Grossman, Linda S., Harrow, Martin, Rosen, Cherise·2010·Comprehensive Psychiatry

Abstract

Individuals with schizophrenia have relative deficits in cognition, although little is known regarding the course of such deficits across the life span and at various stages of the illness. Furthermore, the relationship between psychosis and cognition has not been adequately explored to this point. Prospective, longitudinal, multi-assessment studies of the same patients across time are rare in the field and provide a unique opportunity to examine long-term changes in cognition among individuals with schizophrenia. As part of The Chicago Follow-up Study, we prospectively assessed 244 psychiatric inpatients, including individuals with schizophrenia, other psychotic disorders, and nonpsychotic depression. Assessments were conducted 7 times (once at index hospitalization and then 6 times subsequently for the next 20 years) to provide longitudinal data about cognition and symptoms, with a focus on 2 aspects of cognition: processing speed and the ability to access general knowledge. The Digit Symbol-Coding and Information subtests from the Wechsler Adult Intelligence scale were used to measure the 2 cognitive domains at each assessment. At all 7 assessments, individuals with schizophrenia performed more poorly than the other diagnostic groups on the 2 cognitive measures. However, after the acute phase (index hospitalization), individuals with schizophrenia demonstrated significant improvements in cognition and did not show evidence of cognitive decline over the remaining 6 assessments spanning 20 years. Our data support the presence of relative cognitive impairment in schizophrenia, as well as a pattern of stability in some cognitive areas after the acute phase. In addition, we find evidence for an association between relative cognitive impairment and psychosis.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.comppsych.2010.02.005

Cites

53 of 53 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Cognitive impairments are generally stable over relatively short periods of time in the longitudinal course of schizophrenia.

    “Although cognitive impairments are generally stable over relatively short periods of time in the longitudinal course of schizophrenia58–60 cognitive function is age dependent in healthy controls and schizophrenia samples.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Bonner-Jackson, A., Grossman, L. S., Harrow, M., & Rosen, C.
Affiliations
University of Illinois Chicago (US)
Venue
Comprehensive Psychiatry
Publisher
Elsevier BV
Published
2010-09
Volume
51
Issue
5
Pages
471-479
ISSN
0010-440X (ISSN-L)
OpenAlex
W2134886115
Cited by
81
References
51
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 5 · 2022: 9 · 2021: 4 · 2020: 3 · 2019: 5 · 2018: 2 · 2017: 7 · 2016: 5 · 2015: 5 · 2014: 6 · 2013: 8 · 2012: 9
FWCI
4.15
Type
journal article
Language
en
Open access
Locations
  • Comprehensive Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Institute of Mental Health (MH-068688, MH 26341, R37MH026341, R01MH068688)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Social Sciences › Arts and Humanities › Philosophy › Mental Health and Psychiatry
Keywords
schizophrenia, neurocognitive function, processing speed, general knowledge, cognitive impairment, cognitive decline, psychosis, cognitive stability, long-term follow-up, non-psychotic depression
MeSH terms
Adult, Aging, Chicago, Cognition, Cognition Disorders, Depressive Disorder, Female, Follow-Up Studies, Humans, Male, Middle Aged, Psychotic Disorders, Schizophrenia, Schizophrenic Psychology, Comorbidity, Disease Progression

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review