Table 1.

Prospective diagnostic criteria for prodromal syndromes (as given by PACE Clinic, Melbourne) - diagnosed using comprehensive assessment of symptoms of at-risk mental states (CAARMS)

Attenuated positive symptom syndrome (APSS)	Unusual thought content, suspiciousness, grandiosity, perceptual abnormalities, and/or formal thought disorder that does not satisfy frank psychosis; occurring at least once a week in last month; with worsening course in past 12 months
Brief intermittent psychotic syndrome (BIPS)	Clearly psychotic thought content, paranoia, grandiosity, perceptual abnormalities, and/or formal thought disorder; with onset within last 3 months
Genetic risk + functional deterioration (G/D)	History of any psychotic disorder in first-degree relative OR Schizotypal personality disorder in patient
	Associated with marked functional decline in the past year