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ContextA predictive model of mortality in heart failure may be useful for clinicians to improve communication with and care of hospitalized patients.ObjectivesTo identify predictors of mortality and to develop and to validate a model using information available at hospital presentation.Design, Setting, and ParticipantsRetrospective study of 4031 community-based patients presenting with heart failure at multiple hospitals in Ontario, Canada (2624 patients in the derivation cohort from 1999-2001 and 1407 patients in the validation cohort from 1997-1999), who had been identitifed as part of the Enhanced Feedback for Effective Cardiac Treatment (EFFECT) study.Main Outcome MeasuresAll-cause 30-day and 1-year mortality.ResultsThe mortality rates for the derivation cohort and validation cohort, respectively, were 8.9% and 8.2% in hospital, 10.7% and 10.4% at 30 days, and 32.9% and 30.5% at 1 year. Multivariable …