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TO THE EDITOR: The October 2014 issue of Psychiatric Services included a report of a study by McFarlane and colleagues (1) in which they tested the ability of a community intervention (the Portland Identification and Early Referral [PIER] program) to prevent hospitalization for psychosis of individuals identified as being at clinically high risk of psychosis. They used an autoregressive integrated movingaverage (ARIMA) time-series analysis (2), comparing the monthly (28-day months) rate of hospitalizations in the Greater Portland area before the PIER program began with the monthly rate while the PIER program was operating. Among the findings reported was the following:“Hospitalizations dropped by 2.82 (CI5–4.01 to–1.63) per 28-day month in the Greater Portland area after the PIER intervention. This 26% reduction translates into 189 fewer hospitalizations during the 332 weeks of the PIER intervention, or 29.7 …