Schneider 1981.

Methods	Allocation: randomised. Blindness: double. Duration: 1 year (preceeded by 2 week wash‐out).
Participants	Diagnosis: schizophrenia (DSM II). History: duration ill mean 21 years, informed consent. N=59. Age: mean 45 years, range 21‐65. Sex: 51M, 8F. Setting: not reported.
Interventions	1. Pipothiazine palmitate: dose range 50‐40 mg/IM/2‐5 weeks. N=32. 2. Fluphenazine decanoate: dose range 12.5‐100 mg/IM/2‐5 weeks. N=27.
Outcomes	Leaving the study early. Unable to use ‐ Global impression: CGI (no data). Blood samples: (no usable data).
Notes	67% attrition occured in the control group by the end of 1year, therefore data could not be used.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear