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Temporal relationship between change in cognition and change in functioning in schizophrenia
Joanna M Fiszdon1, Jimmy Choi, Joseph Goulet
1VA Connecticut Healthcare System, West Haven, CT 06516, United States. Joanna.Fiszdon@yale.edu
Schizophrenia Research
|July 29, 2008
Summary
Cognitive improvements predict better Quality of Life (QLS) in schizophrenia patients undergoing work therapy. Memory gains correlated with QLS improvements, while executive function changes showed a complex, negative association.
Area of Science:
- Neuroscience
- Psychiatry
- Clinical Psychology
Background:
- Cross-sectional studies dominate schizophrenia research on cognition and functioning.
- The predictive relationship between temporal changes in cognition and functioning remains unclear.
Purpose of the Study:
- To investigate the longitudinal relationship between cognitive changes and Quality of Life (QLS) in schizophrenia outpatients.
- To determine if changes in memory and executive function predict changes in QLS over 12 months.
Main Methods:
- Longitudinal mixed-effects models were used.
- 151 schizophrenia outpatients in work therapy (with/without cognitive remediation) were assessed at three time-points over 12 months.
- Quality of Life (QLS) and cognitive functions (memory, executive function) were measured.
Main Results:
- Improvements in memory and executive function significantly predicted overall QLS improvement.
- Memory improvements were positively associated with QLS gains.
- Executive function improvements were negatively associated with QLS gains, suggesting complex interactions.
Conclusions:
- Cognitive remediation and work therapy may influence QLS through distinct cognitive pathways.
- The findings highlight the complex interplay between cognitive changes and functional outcomes in schizophrenia.
- Further research is needed to explore moderators of these relationships.
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