Association between Symptom Dimensions and Psychosis Risk Factors with Functioning in First Episode Psychosis: A Six Months Prospective Study.

OBJECTIVE: This study aims to assess the associations of the severity of different symptom dimensions and psychosis risk factors with the overall functioning levels in first-episode psychosis (FEP) patients over a 6-month follow-up period. METHOD: Psychosis symptom dimensions (positive, negative, depression, mania, attention and other cognitive), sociodemographic characteristics and environmental risk factors (alcohol-substance use, childhood traumas, current stressful life events) were prospectively assessed in 32 patients who were hospitalized for FEP during the six-month follow-up period. The associations of these variables with the longitudinal Global Assessment of Functioning (GAF) scores of these patients were analyzed using linear regression or repeated measures ANOVA. RESULTS: The severity of positive, negative, depression and mania dimensions reduced (p<0.001) during the follow-up period, while no significant change was found in Stroop interference effect scores (F=0.4, p=0.53). FEP patients with substance or alcohol use had significantly worse functioning during the follow-up period (F=11.2, p=0.001; F=5.3, p=0.02, respectively), and those patients' functioning improved significantly less (F=10.0, p=0.002; F=4.3; p=0.04, respectively). Stroop test performance detected at the first month of the follow-up period significantly predicted the final general functioning scores of the follow- up [Stroop test word reading time (sec): B=-0.58 (-1.13-0.03); color telling speed (sec): B=-0.35 (-0.59-0.1); interference effect: B=-0.28 (-0.57-0.01)]. CONCLUSION: The stable course and prognostic value of attention and other types of cognitive functioning in FEP patients is remarkable. Interventions for alcohol-substance use in FEP patients should be a part of routine practice.