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Negative symptomatology in schizophrenic outpatients
J Kuck1, S Zisook, J T Moranville
1Department of Psychiatry, University of California, San Diego.
The Journal of Nervous and Mental Disease
|August 1, 1992
Summary
This study found that negative and depressive symptoms in schizophrenia patients are largely independent and do not significantly impact clinical course. Further longitudinal research is needed to understand symptom outcomes.
Area of Science:
- Psychiatry
- Clinical Psychology
Background:
- Negative symptoms are a core feature of schizophrenia, impacting patient functioning.
- The relationship between negative and depressive symptoms in schizophrenia requires further investigation.
Purpose of the Study:
- To examine the prevalence of negative symptoms in schizophrenia.
- To assess the convergence and independence of negative and depressive symptoms.
- To explore the relationship between these symptoms and clinical course variables.
Main Methods:
- Utilized the Scale for the Assessment of Negative Symptoms (SANS) and the Brief Psychiatric Rating Scale (BPRS) for negative symptoms.
- Employed the Brief Symptom Inventory (BSI) and BPRS for depressive symptoms.
- Compared subgroups with prominent versus minimal negative symptoms.
Main Results:
- A majority of stable schizophrenic outpatients exhibited mild to moderate negative and depressive symptoms.
- No significant correlations were found between negative and depressive symptom measures, suggesting symptom independence.
- No significant differences in clinical course variables (age of onset, hospitalization) were observed between subgroups with varying negative symptom severity.
Conclusions:
- Negative and depressive symptoms in schizophrenia appear to be relatively independent constructs.
- Symptom heterogeneity may explain the lack of association with clinical course variables.
- Longitudinal studies are necessary to elucidate the long-term outcomes of negative and depressive symptoms in schizophrenia.