Abstract
Objectives: Previous studies showed that the illness duration is related with cognitive performance in patients with schizophrenia. The Wechsler Adult Intelligence Scale (WAIS) has been used extensively to assess the cognitive function in schizophrenia in both research and clinical practice. In this study, we intended to analyze whether a correlation exists between the indices of short-form WAIS-III and demographic/clinical data (including illness duration, age at onset, and years of education). Methods: We included 34 patients with schizophrenia from a tertiary hospital in Taiwan. Each participant received assessment with the short-form WAIS-III, consisting of seven core subtests. It provided scores for verbal intelligence quotient (VIQ), performance intelligence quotient (PIQ), full-scale intelligence quotient (FSIQ), and four secondary indexes (verbal comprehension, working memory, perceptual organization, and processing speed). Data were analyzed for correlation. Results: The results showed that patients' age at onset was significantly negatively correlated with years of education (p
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