Quantitative sample size
psychosis
In order to detect a medium effect size of 0.5, setting power at 90% for 5% significance, accounting for clustering based on an ICC of 0.002 (as observed within the DIALOG+ trial [Clinicians of any background, including lay community workers will be eligible. Meetings held within each of the participating clinical services indicated that there were sufficient numbers of both clinicians and patients, with many outpatient clinics seeing 100+ patients with psychosis per day.