title: Prognostic systems in intensive care: how do you interpret an observed mortality that is higher than expected?
authors.forename: J E
authors.initials: JE
authors.lastname: Zimmerman
authors.forename: D P
authors.initials: DP
authors.lastname: Wagner
mesh_terms: D018806:APACHE; D019985:Benchmarking / Q000592:standards*; D016638:Critical Illness / Q000401:mortality*; D017052:Hospital Mortality; D006801:Humans; D007362:Intensive Care Units; D011237:Predictive Value of Tests; D011379:Prognosis; D014481:United States / Q000453:epidemiology