Patient AdmissionHospitalizationEmergency Service, HospitalEnglandSmall-Area AnalysisLength of StayPatient ReadmissionCatchment Area (Health)EmergenciesHospitals, PsychiatricWater SofteningRetrospective StudiesPoisoningLondonEmergency TreatmentHospitalsScotlandUtilization ReviewBed OccupancyStatus AsthmaticusInfant, NewbornAmbulatory Surgical ProceduresWestern AustraliaDiagnosis-Related GroupsReferral and ConsultationAsthmaPatient DischargeAcute DiseaseSelf MutilationAge DistributionHospital MortalityProspective StudiesHospitals, DistrictHealth Services MisuseRespiratory Tract DiseasesSocioeconomic FactorsSex DistributionCohort StudiesHospitals, GeneralAge FactorsSeasonsPoisson DistributionTime FactorsAmbulatory CareState MedicineFamily PracticeOutcome Assessment (Health Care)Hospital CostsGreat BritainHealth Maintenance OrganizationsWounds and InjuriesIncidenceRisk FactorsRegression AnalysisWalesTriageSeverity of Illness IndexPneumoniaTreatment OutcomeEmergency Medical ServicesUnited StatesSchool Admission CriteriaPhysician's Practice PatternsSex FactorsOntarioHealth Services ResearchOutcome and Process Assessment (Health Care)Primary Health CareLong-Term CareIntensive Care UnitsChronic DiseaseMorbidityBronchitisHealth Services AccessibilityMedicareRisk AssessmentMyocardial InfarctionFollow-Up StudiesPrevalenceResidence CharacteristicsCross-Sectional StudiesLogistic ModelsHealth Services Needs and DemandGeographySocial ClassRegistriesMental DisordersCost-Benefit AnalysisPulmonary Disease, Chronic ObstructiveCollege Admission TestIntensive CareCommitment of Mentally IllAdmitting Department, HospitalPregnancyInpatientsIntensive Care Units, PediatricCritical IllnessPrognosisAPACHEChild, Hospitalized