Excluded studies
We excluded 62 studies (74 reports) from this review.
1. Issues relating to methods
We excluded most studies because they were not randomised controlled trials (Arlow 1997; Bechdolf 2005b; Bouchaud 1996; Buchanan 1992; Chadwick 1994; Garety 1994; Hartman 1983; Hodel 1994; Hogarty 1991; Jackson 1998; Kemp 1996b; Kingdon 1991; Kuipers 1996; May 1984; Perris 1992; Shon 2002; Spaulding 1992).
2. Issues relating to participants
Two studies reported outcome on individuals at-risk of psychosis (McGorry 2002; Morrison 2002) and were therefore excluded as they do not apply directly to people with a diagnosis of schizophrenia.
3. Issues relating to comparison