Martyns‐Yellowe 1993.

Methods	Allocation: randomised, no further details. Blindness: double ‐ drugs given by a nurse not involved in trial. Duration: 24 weeks*. Setting: prison hospital.
Participants	Diagnosis: schizophrenia (DSM III). History: chronic, stable, drug free. N=36. Age: 21‐40 years. Sex: all male.
Interventions	1. Clopenthixol decanoate: dose 40 mg/IM. N=18. 2. Flupenthixol decanoate: dose 200 mg/IM. N=18. Dosing regime: 4 fortnightly, 3 three‐weekly, 2 monthly = 20 weeks. Additional medication: 2mg benztropine.
Outcomes	Discharge. Side effects. Unable to use ‐ Global Impression (no data). Mental state (BPRS ‐ no SD, residual % of symptoms from baseline ‐ endpoint).
Notes	*Last measurement at 24 weeks, although last dose was at 20 weeks.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear