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Prospective cohort study.
Calgary Early Psychosis Program, Calgary, Canada.
194 people with first episode psychosis (DSM-IV; mean age 24 years; 30% women. Exclusions: non-English speaking.)
Functioning prior to psychosis was assessed using the Premorbid Assessment Scale (PAS). Positive and negative symptoms of psychosis (Positive and Negative Syndrome Scale), social functioning (Quality of Life Scale), and substance abuse (Case Managing Rating Scale for Substance Use) were assessed at base line, 1, and 2 years. K-means cluster analysis was used to identify four patterns of premorbid function (stable-good, stable-intermediate, poor-deteriorating, and …
For correspondence: Jean Addington, Centre for Addiction and Mental Health, 250 College Street, Toronto, Ontario, M5T 1R8, Canada; jean_
Sources of funding: not stated.
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