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Eur Psychiatry. 2005 Aug;20(5-6):372-8.

Outreach and support in south London (OASIS): implementation of a clinical service for prodromal psychosis and the at risk mental state.

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OASIS, PO 67, Institute of Psychiatry, De Crespigny Park, London SE5 8AF, UK.



While recent research points to the potential benefits of clinical intervention before the first episode of psychosis, the logistical feasibility of this is unclear.


To assess the feasibility of providing a clinical service for people with prodromal symptoms in an inner city area where engagement with mental health services is generally poor.


Following a period of liaison with local agencies to promote the service, referrals were assessed and managed in a primary care setting. Activity of the service was audited over 30 months.


People with prodromal symptoms were referred by a range of community agencies and seen at their local primary care physician practice. Over 30 months, 180 clients were referred; 58 (32.2%) met criteria for an at risk mental state, most of whom (67.2%) had attenuated psychotic symptoms. Almost 30% were excluded due to current or previous psychotic illness, of which two-thirds were in the first episode of psychosis. The socio-demographic composition of the 'at risk' group reflected that of the local population, with an over-representation of clients from an ethnic minority. Over 90% of suitable clients remained engaged with the service after 1 year.


It is feasible to provide a clinical service for people with prodromal symptoms in a deprived inner city area with a large ethnic minority population.

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