Hospital ChargesLength of StayHospital CostsFees and ChargesEconomics, HospitalHospitalizationHospitals, TeachingHospitals, UrbanHospitals, PediatricGenetic VariationPatient DischargeCosts and Cost AnalysisUnited StatesRetrospective StudiesCritical PathwaysHealth Care CostsHealth ResourcesDiagnosis-Related GroupsEmergency Service, HospitalHospital MortalityPatient AdmissionHospitals, GeneralHospitals, UniversityMarylandDecision TreesDatabases, FactualMedicareInfant, NewbornHospitals, RuralPostoperative ComplicationsTime FactorsCost-Benefit AnalysisWounds and InjuriesNursing Staff, HospitalTreatment OutcomeAccidents, TrafficOutcome Assessment (Health Care)IncidenceHospital Bed CapacityHospitals, SpecialHospitals, DistrictProspective StudiesHospitalsRegression AnalysisRisk FactorsMultivariate AnalysisHospitals, PrivateFinancial Management, HospitalCohort StudiesRisk AssessmentAge FactorsHospital PlanningSeverity of Illness Index