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Health Services Research Department, Institute of Psychiatry, Kings College London, London, UK
Correspondence: Dr Louise Howard, PO Box 29, Health Services Research Department, Institute of Psychiatry, Kings College London, London, De Crespigny Park, London SE5 8AF, UK. E-mail: l.howard{at}iop.kcl.ac.uk
The relationship between psychiatric patientspreferences for differenttreatments and the outcome of interventions is unclear, as the few relevanttrials have tended to be underpowered. Strong patient preferences result in patients refusing to enter a trial. This leads to bias and limits generalisability, and the patient preference randomised controlled trial (RCT) design has been proposed as an alternative. Limitations and advantages of patient preference RCTs are discussed.
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