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ObjectivesThe objective of the present study was to examine the predictive value of clinical and cognitive -including the cognitive reserve (CR) - variables on the severity of the patient's illness at one year of follow-up.MethodsA study was held with 45 patients with first episode psychosis (FEP) from 3 main hospitals in the Basque Country (Spain). All patients underwent cognitive, clinical, and functional assessments at baseline and at 6 months follow-up. The cognitive measures included were: the Stroop test, Vocabulary sub-test from WAIS-III, the WCST, and Trail Making Test. The clinical and functional measures included were: Positive and Negative Syndrome Scale (PANSS), Young Mania Scale, Montgomery-Asberg Depression scale, and CGI (Clinical Global Impression).ResultsSix-months follow-up data were available for 29 patients. Regression analysis was performed with the 6-month follow-up CGI measure as a dependent variable. Results showed that after controlling for CGI at baseline, -PANSS Negative Symptoms Scale (B = 0.47, p ≤ .05) and the CR measure -Vocabulary from WAIS-III- (B = 0.36, p ≤ .05) were the only two which significantly predicted severity of illness after 6 months (R2 = 0.44) and remained significant when CGI at base line was controlled in the regression analysis. The rest variables did not reach statistical significance.ConclusionsThese findings emphasize that CR have a role on outcome in first episode psychosis, and enhance that exist a relation between cognition and clinical measures in psychosis.FundingBasque Government, Health Department (2008111010); EITB-Maratoia (BIO 09/EM/015).

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