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Cannabis use and cognitive functioning in first-episode schizophrenia patients
José Manuel Rodríguez-Sánchez1, Rosa Ayesa-Arriola, Ignacio Mata
1Department of Psychiatry, CIBERSAM, University Hospital Marqués de Valdecilla, IFIMAV, Santander, Spain. abere2003@yahoo.es
Schizophrenia Research
|September 10, 2010
Summary
Cannabis use in early schizophrenia patients did not negatively impact cognition. Users showed better attention and executive functions, suggesting a subgroup with better premorbid adjustment.
Area of Science:
- Neuroscience
- Psychiatry
- Psychology
Background:
- Cannabis is a widely used substance globally, often linked to cognitive deficits in healthy individuals.
- Research on cannabis use in schizophrenia presents conflicting results, necessitating further investigation.
- Understanding cannabis's impact on early psychosis is crucial for patient management.
Purpose of the Study:
- To investigate the relationship between cannabis use and cognitive/psychopathological features in first-episode schizophrenia.
- To examine cross-sectional and longitudinal effects of cannabis use on cognitive function and premorbid adjustment.
- To differentiate cannabis users from non-users in early schizophrenia phases.
Main Methods:
- Study included 104 first-episode non-affective psychosis patients and 37 healthy controls.
- Patients were categorized into cannabis users (n=47) and non-users (n=57) based on pre-illness use.
- Cross-sectional and longitudinal assessments of clinical, cognitive, and premorbid adjustment variables were conducted.
Main Results:
- Cannabis-using patients demonstrated superior attention and executive functions at baseline and after 1 year.
- Both user and non-user groups exhibited comparable cognitive improvements over the follow-up period.
- Cannabis users displayed better social premorbid adjustment, particularly in early life stages.
Conclusions:
- Cannabis use does not appear detrimental to cognition in first-episode schizophrenia patients.
- Cannabis users may represent a distinct subgroup with enhanced premorbid adjustment and frontal cognitive abilities.
- The quantity or duration of cannabis consumption did not correlate with cognitive performance in this sample.
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