Journal Article

Cognitive Performance and Functional Competence as Predictors of Community Independence in Schizophrenia

R. Walter Heinrichs, Narmeen Ammari, Ashley A. Miles and Stephanie McDermid Vaz

in Schizophrenia Bulletin

Published on behalf of Maryland Psychiatric Research Center

Volume 36, issue 2, pages 381-387
Published in print March 2010 | ISSN: 0586-7614
Published online July 2008 | e-ISSN: 1745-1701 | DOI:
Cognitive Performance and Functional Competence as Predictors of Community Independence in Schizophrenia

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Measures of functional competence have been introduced to supplement standard cognitive and neuropsychological evaluations in schizophrenia research and practice. Functional competence comprises skills and abilities that are more relevant to daily life and community adjustment. However, it is unclear whether relevance translates into significantly enhanced prediction of real-world outcomes. The aim of this study was to assess the specific contribution of functional competence in predicting a key aspect of real-world outcome in schizophrenia: community independence. Demographic, clinical, cognitive, and functional competence data were obtained from 127 patients with schizophrenia or schizoaffective disorder and used to predict community independence concurrently and longitudinally after 10 months. Hierarchical regression analyses indicated that demographic, clinical, and cognitive predictors accounted jointly for 35%–38% of the variance in community independence across assessment points. Functional competence data failed to add significantly to this validity. Considered separately from demographic and clinical predictors, cognitive and functional competence data accounted for significant amounts of outcome variance. However, the addition of functional competence to standard cognitive test data yielded a significant increase in validity only for concurrent and not for longitudinal prediction of community independence. The specific real-world validity of functional competence is modest, yielding information that is largely redundant with standard cognitive performance.

Keywords: cognition; functional competence; real-world outcome

Journal Article.  4255 words. 

Subjects: Child and Adolescent Psychiatry

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