Study	Reason for exclusion
Anonymous 1994	Allocation: not randomised ‐ review.
Axelson 1996	Allocation: not randomised. Interventions: risperidone vs risperidone + other antipsychotic drugs.
Barak 2000	Allocation: randomised. Participants: DSM‐IV schizophrenia. Interventions: risperidone vs typical neuroleptics. Outcomes: information taken from conference abstract, all data unusable, further information being sought.
Berman 1995	Allocation: randomised. Participants: DSM‐III‐R schizophrenia. Interventions: risperidone vs haloperidol. Outcomes: information taken from conference abstract, all data unusable as numbers randomised to each group not given, further information being sought.
Bilder 2001	Allocation: randomised. Participants: treatment resistant DSM‐IV schizophrenia or schizoaffective disorder. Interventions: risperidone vs haloperidol, olanzapine or clozapine. Outcomes: information taken from conference poster, all data unusable as numbers randomised to each group not given, further information being sought.
Bondolfi 1996	Allocation: randomised. Participants: treatment resistant schizophrenia. Interventions: risperidone vs clozapine, atypical comparison.
Brecher 1998	Allocation: randomised. Blindness: double. Participants: schizophrenia, schizoaffective disorder. Interventions: risperidone vs olanzapine, atypcial comparison.
Carman 1995	Allocation: not randomised ‐ review.
Ceskova 1994	Allocation: randomised. Participants: ICD‐10 schizophrenia or schizoaffective psychoses. Interventions: risperidone vs perphenazine. Outcomes: all data unusable as no individual group data given.
Cetin 1999	Allocation: randomised. Participants: schizophrenia. Interventions: risperidone vs haloperidol. Outcomes: no usable data, data taken from conference abstract, further information being sought.
Czober 1993	Allocation: not randomised.
Daniel 1996	Allocation: randomised. Participants: schizophrenia/schizoaffective disorder. Interventions: risperidone vs clozapine, atypical comparison.
Deshmukh 1998	Allocation: unclear if randomised, seeking further information.
Estrella 1996	Allocation: randomised. Participants: treatment resistant schizophrenia. Interventions: risperidone vs clozapine, atypical comaprison.
Gallhofer 1995	Allocation: randomised. Participants: schizophrenia. Interventions: risperidone vs conventional neruoleptics. Outcomes: no usable data, information available in conference abstract only, further information being sought.
Gelders 1989	Allocation: not randomised, review.
Gureje 1998	Allocation: randomised. Blindness: double. Participants: schizophrenia, schizophreniform disorder, schizoaffective disorder. Interventions: risperidone vs olanzapine, atypical comparison.
Heinrich 1994	Allocation: randomised. Participants: schizophrenia. Interventions: risperidone vs clozapine, atypical comparison.
Heylen 1992	Allocation: not randomised, review.
Kleiser 1995	Allocation: randomised. Participants: chronic schizophrenia. Interventions: risperidone vs clozapine, atypical comparison.
Klieser 1996	Allocation: not randomised, review.
Kopala 1996	Allocation: not randomised, review.
Meltzer 1996	Allocation: randomised. Participants: schizophrenia. Interventions: clozapine withdrawl vs typical neuroleptic.
Muller 1998	Allocation: randomised. Participants: schizophrenia, schizoaffective, major depression with psychotic features. Interventions: risperidone vs haloperidol. Outcomes: unable to use data from those with schizophrenia or schizoaffective disorder alone, further information being sought.
Murasaki 1995	Allocation: unclear if randomised, seeking further information.
Nagao 1998	Allocation: unclear if randomised. Participants: people with DSM‐IV schizophrenia. Interventions: risperidone vs haloperidol, cross‐over. Outcomes: no relevant or usuable outcomes, further information being sought.
Pathiraja 1995	Allocation: randomised. Participants: DSM‐II‐R schizophrenia. Interventions: risperidone vs haloperidol, MAR 327 or placebo. Outcomes: unusable data, information taken from conference abstract, further information being sought.
Sikich 2001	Allocation: randomised. Participants: DSM‐VI psychotic disorder. Interventions: risperidone vs haloperidol or olanzapine. Outcomes: all data unusable, information taken from conference abstract, further information being sought.
Zhou 1998	Allocation: randomised. Participants: chronic schizophrnenia. Interventions: risperidone vs haloperidol. Outcomes: all data unusable, information taken from english abstract, further information and translation being sought.
Zinner 1992	Allocation: unclear if randomised. Participants: people with chronic DSM‐III‐R schizophrenia. Interventions: risperidone vs haloperidol. Outcomes: all data unusable, information taken from conference abstract, further information being sought.

DSM ‐ Diagnostic Statistical Manual (versions II to IV, R=revised)