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Cannabis users have higher premorbid IQ than other patients with first onset psychosis.

2013

Background: A number of studies have reported that patients with psychosis who use cannabis have better cognitive performance than those who do not. This is surprising as cannabis can impair cognition in healthy subjects. An obvious question is whether the better current performance of psychotic patients who have used cannabis is a reflection of their having a higher premorbid IQ than those psychotic patients who haven't used cannabis. Aim: In a sample of patients at their first episode of psychosis, we tested the hypothesis that patients who smoked cannabis would have a higher premorbid IQ than patients who did not. Methodology: 279 participants (119 patients and 160 healthy controls) were…

AdultMalemedicine.medical_specialtyPsychosisMarijuana AbuseFirst Episode of Psychosis (FEP)Premorbid IQIntelligenceNeuropsychological TestsSubstance usebehavioral disciplines and activitiesYoung AdultCognitionSettore M-PSI/08 - Psicologia Clinicamental disordersmedicineHumansEffects of sleep deprivation on cognitive performanceCannabiYoung adultCannabis; Cognition; First Episode of Psychosis (FEP); IQ; Premorbid IQ; Risk of psychosis; Schizophrenia; Substance useRisk of psychosiPsychiatryBiological PsychiatryFirst episodeIntelligence TestsPsychiatric Status Rating ScalesAnalysis of VarianceChi-Square DistributionIntelligence quotientbiologymedicine.diseasebiology.organism_classificationPsychiatry and Mental healthPsychotic DisordersSchizophreniaIQSchizophreniaFemaleCannabisPsychologyhuman activitiesChi-squared distributionClinical psychology
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