Hospital MortalityMortalityRetrospective StudiesInfant MortalityIntensive Care UnitsLength of StayCause of DeathTreatment OutcomeTime FactorsProspective StudiesCohort StudiesAPACHEHospitals, TeachingPostoperative ComplicationsFollow-Up StudiesCritical IllnessRisk FactorsSurvival RateSurvival AnalysisUnited StatesPatient AdmissionChild MortalityHospitals, UniversityIntensive CareRisk AssessmentInfant, NewbornAge FactorsMaternal MortalityHospital CostsPrognosisIncidenceLogistic ModelsRisk AdjustmentSepsisSeverity of Illness IndexProportional Hazards ModelsHospitals, GeneralHospital Bed CapacityMyocardial InfarctionMultivariate AnalysisRegistriesAge DistributionHospitalizationEpidemiologic MethodsRespiration, ArtificialSex FactorsHospitals, Low-VolumeSex DistributionChi-Square DistributionAcute DiseaseHospitals, High-VolumeCoronary Artery BypassHospitalsPredictive Value of TestsEmergenciesSurgery Department, HospitalOutcome Assessment (Health Care)MorbidityHospitals, UrbanEnglandSurgical Procedures, OperativeComorbidityAcute Kidney InjuryKaplan-Meier EstimatePatient DischargeCritical CareRegression AnalysisOdds RatioDiagnosis-Related GroupsHospitals, Group PracticeEmergency Service, HospitalPerinatal MortalityDeath CertificatesCardiac Surgical ProceduresBrazilCardiovascular DiseasesRiskMultiple Organ FailureHospitals, PediatricNursing Staff, HospitalHospitals, SpecialFetal MortalityCardiology Service, HospitalCenters for Medicare and Medicaid Services (U.S.)Hospitals, DistrictQuality of Health CareCross InfectionPneumoniaSurgical Procedures, ElectiveEconomics, HospitalShock, SepticAortic AneurysmMortality, PrematureReoperationHospitals, PrivateHeart Valve ProsthesisPoisson DistributionHeart Valve Prosthesis ImplantationVascular Surgical ProceduresTrauma Severity Indices