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  • Title: The antecedents of non-affective psychosis in a birth-cohort, with a focus on measures related to cognitive ability, attentional dysfunction and speech problems.
    Author: Welham J, Scott J, Williams GM, Najman JM, Bor W, O'Callaghan M, McGrath J.
    Journal: Acta Psychiatr Scand; 2010 Apr; 121(4):273-9. PubMed ID: 19694626.
    Abstract:
    OBJECTIVE: Adults with non-affective psychosis show subtle deviations in a range of developmental trajectories as children and adolescents. METHOD: Based on a birth-cohort (n = 3801), we examined the Peabody Picture Vocabulary Test (PPTV) at age 5, and Raven's Standard Progressive Matrices (RSPM) and Wide Range Achievement Test reading scale (WRAT-R) at age 14. Items related to speech problems and attentional dysfunction were available from maternal- or self-report. At age 21, we identified 60 cohort members who were screen-positive for non-affective psychosis (SP-NAP). RESULTS: Impaired performance on the PPVT and RSPM (but not WRAT-R) predicted SP-NAP for males only. Male cohort members in the highest quartile for attentional dysfunction at ages 5 and 14 were about 5-8 times more likely to develop SP-NAP. SP-NAP in males was significantly associated with speech problems at age 14. CONCLUSION: Males who develop non-affective psychoses have subtle impairments in cognitive capacity prior to the development of their psychotic disorder.
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