Hospital MortalityRespiration, ArtificialMortalityVentilationIntensive Care UnitsPulmonary VentilationRetrospective StudiesLength of StayAPACHECritical IllnessHigh-Frequency VentilationHospitals, TeachingIntensive CareTime FactorsProspective StudiesTreatment OutcomeNoninvasive VentilationVentilator WeaningIntermittent Positive-Pressure VentilationTidal VolumeHospitals, UniversityPostoperative ComplicationsPositive-Pressure RespirationPatient AdmissionHospital CostsCohort StudiesHigh-Frequency Jet VentilationRisk FactorsInfant MortalityRespirationHospitals, GeneralFollow-Up StudiesIntubation, IntratrachealCause of DeathRespiratory MechanicsHospital Bed CapacityInfant, NewbornLogistic ModelsCritical CareRespiratory Distress Syndrome, AdultVentilators, MechanicalSeverity of Illness IndexSepsisRisk AssessmentHospitalizationPulmonary Gas ExchangeSurvival RateUnited StatesSurvival AnalysisRisk AdjustmentPrognosisHospitals, Low-VolumeAcute DiseaseCarbon DioxideHospitals, High-VolumeAge FactorsVentilation-Perfusion RatioHospitals, UrbanHospitals, Group PracticeNursing Staff, HospitalEmergenciesCoronary Artery BypassMultivariate AnalysisEpidemiologic MethodsSurgery Department, HospitalIncidenceChi-Square DistributionHospitals, PediatricHospitalsMyocardial InfarctionEmergency Service, HospitalCardiac Surgical ProceduresOutcome Assessment (Health Care)Surgical Procedures, OperativeEconomics, HospitalPatient DischargeMultiple Organ FailureAcute Kidney InjuryDiagnosis-Related GroupsPredictive Value of TestsHypercapniaHospitals, SpecialHospitals, DistrictPneumoniaCross InfectionCenters for Medicare and Medicaid Services (U.S.)Cardiology Service, HospitalHospitals, PrivateAcute Lung InjuryLungEnglandPneumonia, Ventilator-AssociatedRegistriesOxygenChild MortalityMaternal MortalityQuality of Health CareTracheostomyBlood Gas AnalysisOdds Ratio