Generally develops in early adult life and although men and women are pretty equally affected, peak age of onset in women is 5-10 years later than men.
Childhood SZ is occasionally diagnosed but it's rare.
SZ is an episodic illnessin which periods of psychotic disturbance are usually interspersed with more normal periods of functioning.Emergence of psychotic symptoms usually occurs after a prodromal period of a few weeks or months in which changes in mood and behaviour are evident to people close to the sufferer but specific symptoms havn't appeared yet.
During this period, individuals often suffer from low mood and anxiety and experience difficulties in social relationships and in concentrating on work or study.
Active phase of SZ follows and a psychotic episode may last from 1-6 months nut can extend to a year.
Inter-episode functioning varies greatly between individuals - better inter-episode functioning is associated with better prognosis.
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