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Review
. 2014 Jan;59(1):13-7.
doi: 10.1177/070674371405900104.

Cognition, function, and disability in patients with schizophrenia: a review of longitudinal studies

Tarek K Rajji  1 , Dielle Miranda  2 , Benoit H Mulsant  3
Affiliations
Review

Cognition, function, and disability in patients with schizophrenia: a review of longitudinal studies

Tarek K Rajji et al. Can J Psychiatry. 2014 Jan.

Abstract
in English, French

This paper aims to review longitudinal studies assessing the impact of cognition on function in patients with schizophrenia. PubMed and Scholars Portal were searched using search terms related to schizophrenia, cognition, function, and longitudinal studies. Some functional abilities have been studied more than others. Some studies suggest that the impact of cognition on function depends on the severity of baseline cognitive deficits. Other studies suggest that the impact of cognition on function depend on what phase of the illness the patient is in or what stage in that particular function the patient is involved in. Finally, few studies assessed interactions between cognition and other aspects of schizophrenia in predicting function, such as functional capacity, insight, motivation, and negative symptoms. More longitudinal and comprehensive studies are needed. A focus on community living is of high public significance as patients with schizophrenia continue to grow old. Future studies should also focus on the longitudinal interactions between cognition and other dimensions of schizophrenia as well as on the biological factors that underlie these interactions.

Cet article vise à examiner les études longitudinales évaluant l’effet de la cognition sur la fonction des patients souffrant de schizophrénie. Des recherches ont été effectuées dans PubMed et Scholars Portal à l’aide de mots clés liés à la schizophrénie, la cognition, la fonction, et les études longitudinales. Certaines capacités fonctionnelles ont été étudiées plus que d’autres. Des études suggèrent que l’effet de la cognition sur la fonction dépend de la gravité des déficits cognitifs au départ. D’autres études font valoir que l’effet de la cognition sur la fonction dépend de la phase de la maladie ou du stade de cette fonction où se situe le patient. Enfin, peu d’études ont évalué les interactions entre cognition et autres aspects de la schizophrénie pour prédire la fonction, comme la capacité fonctionnelle, l’intuition, la motivation, et les symptômes négatifs. Il faut plus d’études longitudinales et exhaustives. Mettre l’accent sur la vie dans la communauté est d’une grande importance publique car les patients souffrant de schizophrénie continuent de vieillir. Les futures études devraient aussi se pencher sur les interactions longitudinales entre la cognition et d’autres dimensions de la schizophrénie, ainsi que sur les facteurs biologiques qui sous-tendent ces interactions.

Keywords: cognition; disability; function; rehabilitation; schizophrenia.

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