Hospital CostsHospitalizationCosts and Cost AnalysisHealth Care CostsLength of StayEconomics, HospitalCost AllocationHospital ChargesCost of IllnessCost ControlHospitals, UniversityRetrospective StudiesHospitals, TeachingDrug CostsUnited StatesCost-Benefit AnalysisDiagnosis-Related GroupsCost SavingsHospital Bed Capacity, 500 and overHospital Bed CapacityDirect Service CostsHospitals, UrbanInsurance, Health, ReimbursementHospital PlanningHospitals, GeneralInsurance, HospitalizationPatient ReadmissionProspective StudiesPatient AdmissionFinancial Management, HospitalMedicarePatient DischargeModels, EconomicInpatientsTime FactorsRisk FactorsHospitals, PediatricIntermediate Care FacilitiesEmergency Service, HospitalTreatment OutcomeInfant, NewbornCohort StudiesHospitals, ProprietaryHospitalistsNursing Staff, HospitalHealth ResourcesIncidenceAccountingHospitals, PsychiatricCritical PathwaysFollow-Up StudiesAmbulatory CareOutcome Assessment (Health Care)Hospitals, SpecialUtilization ReviewAncillary Services, HospitalEconomic CompetitionHospitals, DistrictPostoperative ComplicationsIntensive Care UnitsHospitals, PrivateHealth ExpendituresSurgical Procedures, ElectiveBed OccupancyCross InfectionHealth Services ResearchMulti-Institutional SystemsRecovery RoomOperating RoomsDatabases, FactualAge FactorsHospitals, CommunityOwnershipHospital MortalityRegression AnalysisModels, EconometricAcademic Medical CentersEconomics, MedicalMultivariate AnalysisSeverity of Illness IndexHealth Facility ClosureQuality of Health CareRisk AssessmentHospital RecordsComorbidityProspective Payment SystemCost SharingLogistic ModelsHospital UnitsHospital DepartmentsCaliforniaMedicaidHeart FailureManaged Care ProgramsSurgical Procedures, OperativeHospitalsAmbulatory Surgical ProceduresNew YorkChild, HospitalizedChi-Square Distribution