Hospital MortalityMortalityPainIntensive Care UnitsRetrospective StudiesLength of StayHospitals, TeachingAPACHETreatment OutcomeProspective StudiesPain ManagementChronic PainTime FactorsCritical IllnessHospitals, UniversityPostoperative ComplicationsPatient AdmissionIntensive CareHospital CostsCohort StudiesPain ThresholdFollow-Up StudiesRisk FactorsHospitals, GeneralInfant MortalityPain, PostoperativeCause of DeathHospital Bed CapacityBack PainLogistic ModelsLow Back PainSeverity of Illness IndexRisk AdjustmentPain MeasurementRisk AssessmentUnited StatesHospitals, Low-VolumeHospitalizationSepsisAbdominal PainSurvival RateSurvival AnalysisHospitals, High-VolumePrognosisRespiration, ArtificialNeck PainPain, IntractableAge FactorsHospitals, UrbanHospitals, Group PracticeNursing Staff, HospitalEmergenciesSurgery Department, HospitalMyocardial InfarctionEmergency Service, HospitalMultivariate AnalysisEpidemiologic MethodsAcute DiseaseInfant, NewbornIncidenceCoronary Artery BypassChi-Square DistributionEconomics, HospitalHospitals, PediatricOutcome Assessment (Health Care)HospitalsPelvic PainCritical CareDiagnosis-Related GroupsPain PerceptionPatient DischargeSurgical Procedures, OperativeHospitals, SpecialHospitals, DistrictFacial PainPredictive Value of TestsCenters for Medicare and Medicaid Services (U.S.)Cardiology Service, HospitalAcute Kidney InjuryEnglandCardiac Surgical ProceduresAcute PainRegistriesHospitals, PrivateComorbidityChild MortalityMaternal MortalityQuality of Health CarePain, ReferredMultiple Organ FailureOdds RatioCross InfectionHeart Valve ProsthesisSex FactorsProportional Hazards ModelsAortic AneurysmFinancial Management, HospitalAge DistributionReoperationHeart Valve Prosthesis Implantation