General intellectual impairment is an important determinant of poor language test performance in schizophrenia, but presence of formal thought disorder may also contribute. A higher-order semantic deficit may be particularly relevant to both linguistic impairment and formal thought disorder.
Despite significant differences in presentation, elderly patients with schizophrenia and very late onset schizophrenia-like psychosis have much in common. Both groups are vulnerable with high levels of psychopathology, poor insight, sensory impairment and social isolation. The needs of older people with schizophrenia must be taken into account when services for older adults are planned.
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