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Comorbid substance abuse and neurocognitive function in recent-onset schizophrenia
Thomas Wobrock1, Helmut Sittinger, Bernd Behrendt
1Dept. of Psychiatry and Psychotherapy, University Hospital of Saarland, 66421 Homburg/Saar, Germany. thomas.wobrock@uniklinik-saarland.de
European Archives of Psychiatry and Clinical Neuroscience
|November 30, 2006
Summary
Schizophrenia patients with substance use disorder (SUD) show fewer neurocognitive deficits than those without SUD, particularly in verbal fluency. Integrated treatment programs are recommended for these patients.
Area of Science:
- Neuroscience
- Psychiatry
- Addiction Medicine
Background:
- Comorbid substance use disorder (SUD) affects up to 65% of schizophrenia patients.
- Limited understanding exists regarding SUD's impact on neurocognitive function in schizophrenia.
Purpose of the Study:
- To investigate the influence of substance abuse on neurocognitive function in recent-onset schizophrenia patients.
- To compare neurocognitive performance between schizophrenia patients with and without comorbid SUD.
Main Methods:
- Prospective study of 68 recent-onset schizophrenia/schizoaffective disorder patients.
- Psychopathological evaluation using BPRS, SANS, MADRS, CGI, GAF.
- Neuropsychological testing (TMT A/B, Digit Span, Corsi, VFT, WCST) after stabilization.
- Substance abuse assessed using EuropASI, with cannabis being prevalent.
Main Results:
- 36% of patients reported substance abuse; abusers were younger, male-predominant, and of lower socioeconomic status.
- Abusers showed less attentional impairment on admission (SANS subscale).
- Non-abusers performed better in verbal fluency (letter category) and Digit Span (backwards).
- Substance abusers showed a non-significant trend towards better executive functioning (WCST).
Conclusions:
- Schizophrenia patients with SUD may not exhibit significantly worse neurocognitive deficits compared to non-abusers.
- Findings suggest the potential for integrated treatment programs utilizing cognitive strategies for comorbid SUD in schizophrenia.
- Results align with existing studies on first-episode schizophrenia patients.
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